WO2016090842A1 - 一种gsm网络切换异常的优化方法及装置 - Google Patents

一种gsm网络切换异常的优化方法及装置 Download PDF

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Publication number
WO2016090842A1
WO2016090842A1 PCT/CN2015/078787 CN2015078787W WO2016090842A1 WO 2016090842 A1 WO2016090842 A1 WO 2016090842A1 CN 2015078787 W CN2015078787 W CN 2015078787W WO 2016090842 A1 WO2016090842 A1 WO 2016090842A1
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handover
switching
preset
cell
level
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PCT/CN2015/078787
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English (en)
French (fr)
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刘杰
马媛
王连臣
丁丁
王志强
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中兴通讯股份有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition

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  • This paper relates to the field of mobile communication technologies, and in particular, to a GSM (Global System for Mobile Communications) network switching anomaly optimization method and apparatus.
  • GSM Global System for Mobile Communications
  • Switching is a process in which a mobile user moves from one traffic channel to another during a call.
  • the success of the handover is a prerequisite for ensuring that the mobile terminal can move at any time during the call and keep the call continuous, which is the main embodiment of the advantage of the mobile network.
  • Switching success rate is an important indicator of network quality, and it is the most direct manifestation of user perception. Improving network switching success rate is very important for improving network quality.
  • the traditional analysis method of switching abnormality is mainly based on the experience of network optimization engineers. The solution is single and the cycle is long, and the problem location is not accurate enough. Therefore, there is a need for a method of combining multiple data joint analysis.
  • the analysis methods of traditional switching abnormalities generally use the following reasons to speculate and view the problem of switching abnormalities, including: not initiating handover problems, handover failure problems caused by hardware failures, and handover failure problems caused by unreasonable data configuration.
  • the traditional methods of analysis are based on the experience of work to check the cause of the problem one by one, and cannot be fully and quickly optimized.
  • the embodiment of the invention provides an optimization method and device for GSM network switching anomaly, which solves the problem that the related technology starts to check the problem one by one from the work experience, and cannot be fully and quickly optimized.
  • An embodiment of the present invention provides an optimization method for a handover abnormality of a GSM network, including the following steps:
  • MRCI Measure Report Carrier Interference
  • the handover abnormality includes a handover failure, a ping-pong handover, and a frequent handover from a current cell handover to a target cell;
  • the CDT data is call detailed tracking data
  • the MRCI data is carrier interference measurement report data.
  • the method further includes:
  • the geographic location of the filtered abnormal cells is located through engineering data and geographic information systems.
  • the handover abnormality is a handover failure of the handover from the current cell to the target cell
  • the abnormal cell that filters out the abnormal handover includes:
  • the first time interval of the adjacent handover failure is obtained by recording the time when the handover failure occurs to the same target cell.
  • the abnormal cell in which the handover occurs is an abnormal cell that fails handover;
  • the first time interval is a time difference between two consecutive handover failures when a handover occurs to the same target cell.
  • the handover abnormality is a ping-pong handover from the current cell to the target cell, and the abnormal cell that filters out the abnormality of the handover includes:
  • the second time interval refers to a time difference between two consecutive handovers when a handover occurs between the current cell and the target cell.
  • the handover abnormality is a frequent handover from the current cell to the target cell
  • the abnormal cell that filters out the abnormality of the handover includes:
  • the third time interval refers to a time difference between two consecutive handovers when handover occurs between no less than three cells.
  • the handover abnormality is a ping-pong handover or a frequent handover from the current cell to the target cell, and the abnormality of the abnormal handover of the obtained abnormal handover cell is analyzed according to the MRCI data, and the cause of the handover abnormality is obtained.
  • Optimization suggestions for solving switching anomalies including:
  • the switching abnormality occurs between the same frequency band, and the level in the neighboring cell list before the switching target carrier frequency switching and the average level difference of the serving cell after the switching are calculated. If the fluctuation is less than or equal to the first preset level, the following is performed. determination:
  • the link of the cell is unbalanced, and it is recommended to check the connection of the feeder port; if the link difference of the average level of the uplink and downlink before the handover is not greater than or equal to the link value of the uplink and downlink average level before the preset handover, Then, the average uplink quality before the handover is calculated.
  • the carrier frequency has a large interference, and it is recommended to replace If the sum of the number of downlink quality salvage handovers and the number of abnormal handovers does not exceed the preset downlink quality salvage handover ratio, the following determination is performed:
  • IMSI International Mobile Subscriber Identity
  • IMSI user terminal may have a problem; if the sum of the uplink quality salvage handover times and the abnormal handover times does not exceed the preset uplink quality salvage handover ratio, the following determination is performed:
  • the ratio of the power budget PBGT switching times to the abnormal switching times exceeds the preset power budget switching ratio, and an optimization suggestion is given: the area is the unowned coverage, and it is recommended to modify the PBGT threshold parameter value between the cells.
  • the handover abnormality is a ping-pong handover from the current cell to the target cell, and if the reason for the handover abnormality and the optimization suggestion for the handover abnormality are not obtained, the method further includes:
  • the handover abnormality is a ping-pong handover or a frequent handover from the current cell to the target cell, and the abnormality of the abnormal handover of the obtained abnormal handover cell is analyzed according to the MRCI data, and the cause of the handover abnormality is obtained.
  • Optimization suggestions for solving switching anomalies including:
  • the switching abnormality occurs between different frequency bands, and the level in the neighboring cell list before the switching target carrier frequency switching and the average level difference as the serving cell after the switching are calculated. If the fluctuation is less than or equal to the first preset level, the following is performed. determination:
  • the link of the cell is unbalanced, and it is recommended to check the connection of the feeder port; if the link difference of the average level of the uplink and downlink before the handover is not greater than or equal to the link value of the uplink and downlink average level before the preset handover, Then, the average uplink quality before the handover is calculated.
  • the carrier frequency has a large interference, and it is recommended to replace If the sum of the number of downlink quality salvage handovers and the number of abnormal handovers does not exceed the preset downlink quality salvage handover ratio, the following determination is performed:
  • the problem is: the IMSI user terminal may have a problem; if the sum of the uplink quality salvage handover times and the abnormal handover times is exceeded, the preset uplink quality salvage handover is exceeded. For the ratio, the following decision is made:
  • the optimization suggestion is given: the parameter setting is incorrect; if yes, it is determined that if the downlink quality switching ratio exceeds the preset downlink quality switching ratio, Then, the frequency optimization analysis of the target cell carrier frequency is performed, and an optimization suggestion is given: the carrier frequency of the target cell has strong interference, and it is recommended to replace the frequency point; if the uplink level switching ratio exceeds the preset uplink level switching ratio, it is given Optimization suggestion: The target cell carrier frequency link is not balanced seriously. It is recommended to check the uplink connection.
  • an optimization suggestion is given: the target cell to the current cell reverse PBGT handover threshold is set too small; If the quality switching ratio exceeds the preset downlink quality switching ratio, the frequency optimization analysis of the target cell carrier frequency is performed, and optimization suggestions are given: the carrier frequency of the target cell has strong interference, and the frequency is recommended to be replaced; if the uplink level switching ratio is exceeded If the preset uplink level switching ratio is preset, an optimization suggestion is given: the target cell carrier frequency link is not balanced seriously, and it is recommended to check the uplink connection;
  • the current cell frequency band is 900, and the target cell frequency band is 1800.
  • the handover abnormality is a ping-pong handover from the current cell to the target cell, and if the reason for the handover abnormality and the optimization suggestion for the handover abnormality are not obtained, the method further includes:
  • the level in the neighboring cell list before the switching target carrier frequency switching and the average level difference as the serving cell after the handover If the fluctuation is greater than or equal to the second preset level, check whether other cell in the same cell has a pre-switching power.
  • the phenomenon that the average fluctuation of the adjustment is greater than or equal to the second preset level value, if any, indicates that the problem is: the cell has a problem of the feeder line; if not, it checks whether the other carrier frequency of the same cell has this phenomenon, if If not, an optimization suggestion is given: the carrier frequency has a transmit function If the rate is not stable, it is recommended to check. If there is, then the optimization suggestion is given: the feeder interface of the cell is loose and needs to be checked.
  • An embodiment of the present invention further provides an apparatus for optimizing an abnormality of a GSM network handover, including:
  • a screening module configured to filter out abnormal cells that switch abnormally by analyzing CDT data
  • the optimization module is configured to analyze, according to the MRCI data, an abnormality of the abnormality of the obtained abnormal handover cell, and obtain an optimization suggestion of the handover abnormality and the solution of the handover abnormality;
  • the handover abnormality includes a handover failure, a ping-pong handover, and a frequent handover from a current cell handover to a target cell;
  • the CDT data is call detailed tracking data
  • the MRCI data is carrier interference measurement report data.
  • the device further includes: a positioning unit configured to locate the geographical location of the filtered abnormal cell by using engineering data and a geographic information system.
  • the screening module includes:
  • Obtaining a first time interval unit configured to record, by using a time period of failing to switch to the same target cell, to obtain a plurality of first time intervals in which the adjacent handover fails;
  • the first time interval set is set An abnormal cell that has switched to the same target cell as an abnormal cell that fails handover;
  • the first time interval is a time difference between two consecutive handover failures when a handover occurs to the same target cell.
  • the screening module includes:
  • Obtaining a second time interval unit configured to switch to the current cell and the target cell by The time of the work is recorded, and a plurality of second time intervals in which the adjacent handover succeeds are obtained;
  • Filtering the second time interval set unit configured to filter, in the plurality of second time intervals, a second time interval set in which the second time interval is less than or equal to a preset second time interval;
  • the second time interval refers to a time difference between two consecutive handovers when a handover occurs between the current cell and the target cell.
  • the screening module includes:
  • Obtaining a third time interval unit configured to record, by using a time interval in which no handover occurs in not less than three cells, to obtain a plurality of third time intervals in which the adjacent handover succeeds;
  • a third time interval set unit configured to filter, in the plurality of third time intervals, a third time interval set in which the third time interval is less than or equal to a preset third time interval
  • the switching is not less than Three cells are used as abnormal cells for frequent handover;
  • the third time interval refers to a time difference between two consecutive handovers when handover occurs between no less than three cells.
  • the handover abnormality is a ping-pong handover or a frequent handover from the current cell to the target cell
  • the optimization module is configured to: determine that the handover abnormality occurs between the same frequency band, and calculate the handover target carrier frequency before switching The level in the neighbor list and the average level difference after the handover as the serving cell. If the fluctuation is less than or equal to the first preset level, the following determination is made:
  • the link of the cell is unbalanced, and it is recommended to check the connection of the feeder port; if the link difference of the average level of the uplink and downlink before the handover is not greater than or equal to the link value of the uplink and downlink average level before the preset handover, Then, the average uplink quality before the handover is calculated.
  • the carrier frequency has a large interference, and it is recommended to replace If the sum of the number of downlink quality salvage handovers and the number of abnormal handovers does not exceed the preset downlink quality salvage handover ratio, the following determination is performed:
  • IMSI International Mobile Subscriber Identity
  • IMSI user terminal may have a problem; if the sum of the uplink quality salvage handover times and the abnormal handover times does not exceed the preset uplink quality salvage handover ratio, the following determination is performed:
  • the ratio of the power budget PBGT switching times to the abnormal switching times exceeds the preset power budget switching ratio, and an optimization suggestion is given: the area is the unowned coverage, and it is recommended to modify the PBGT threshold parameter value between the cells.
  • the handover abnormality is a ping-pong handover from the current cell to the target cell
  • the optimization module is further configured to: when the optimization reason for the handover abnormality and the optimization of the handover abnormality are not obtained, perform the following determination:
  • the handover abnormality is a ping-pong handover or a frequent handover from a current cell to a target cell
  • the optimization module is configured to: determine that the handover abnormality occurs between different frequency bands, and calculate a handover target carrier frequency before switching The level in the neighbor list and the average level difference after the handover as the serving cell. If the fluctuation is less than or equal to the first preset level, the following determination is made:
  • the link of the cell is unbalanced, and it is recommended to check the connection of the feeder port; if the link difference of the average level of the uplink and downlink before the handover is not greater than or equal to the link value of the uplink and downlink average level before the preset handover, Then, the average uplink quality before the handover is calculated.
  • the carrier frequency has a large interference, and it is recommended to replace If the sum of the number of downlink quality salvage handovers and the number of abnormal handovers does not exceed the preset downlink quality salvage handover ratio, the following determination is performed:
  • the problem is: the IMSI
  • the user terminal may have a problem; if the sum of the uplink quality salvage handover times and the abnormal handover times is not more than the preset uplink quality salvage handover ratio, the following determination is performed:
  • the optimization suggestion is given: the parameter setting is incorrect; if yes, it is determined that if the downlink quality switching ratio exceeds the preset downlink quality switching ratio, Then, the frequency optimization analysis of the target cell carrier frequency is performed, and an optimization suggestion is given: the carrier frequency of the target cell has strong interference, and it is recommended to replace the frequency point; if the uplink level switching ratio exceeds the preset uplink level switching ratio, it is given Optimization suggestion: The target cell carrier frequency link is not balanced seriously. It is recommended to check the uplink connection.
  • an optimization suggestion is given: the target cell to the current cell reverse PBGT handover threshold is set too small; If the quality switching ratio exceeds the preset downlink quality switching ratio, the frequency optimization analysis of the target cell carrier frequency is performed, and optimization suggestions are given: the carrier frequency of the target cell has strong interference, and the frequency is recommended to be replaced; if the uplink level switching ratio is exceeded If the preset uplink level switching ratio is preset, an optimization suggestion is given: the target cell carrier frequency link is not balanced seriously, and it is recommended to check the uplink connection;
  • the current cell frequency band is 900, and the target cell frequency band is 1800.
  • the handover abnormality is a ping-pong handover from the current cell to the target cell
  • the optimization module is further configured to: when the optimization reason for the handover abnormality and the optimization of the handover abnormality are not obtained, perform the following determination:
  • the level in the neighboring cell list before the switching target carrier frequency switching and the average level difference as the serving cell after the handover If the fluctuation is greater than or equal to the second preset level, check whether other cell in the same cell has a pre-switching power.
  • the phenomenon that the average fluctuation of the adjustment is greater than or equal to the second preset level value, if any, indicates that the problem is: the cell has a problem of the feeder line; if not, it checks whether the other carrier frequency of the same cell has this phenomenon, if If not, an optimization suggestion is given: the carrier frequency has a transmit function If the rate is not stable, it is recommended to check. If there is, then the optimization suggestion is given: the feeder interface of the cell is loose and needs to be checked.
  • the embodiment of the invention further provides a computer readable storage medium storing program instructions, which can be implemented when the program instructions are executed.
  • the embodiment of the present invention combines engineering data and wireless data, and performs association analysis from multiple dimensions such as handover failure, ping-pong handover and frequent handover, and gives network optimization guidance opinions and It is recommended that the location where the switch fails can be located on the map to assist the network optimization engineer to quickly find the problem, improve the user experience, and save a lot of time.
  • FIG. 1 is a flowchart of an optimization method for a handover abnormality of a GSM network according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of an apparatus for optimizing an abnormality of a GSM network handover according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a GMS network handover abnormal event analysis according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for optimizing a handover abnormality of a GSM network according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps:
  • Step S101 screening the CDT data to select an abnormal cell with abnormal handover
  • Step S102 Analyze the cause of the abnormal handover of the abnormal cell that is abnormally switched according to the MRCI data, and obtain an optimization suggestion for the abnormality of the handover and the solution of the handover abnormality;
  • the handover abnormality includes a handover failure, a ping-pong handover, and a frequent handover from a current cell handover to a target cell;
  • the CDT data is call detailed tracking data
  • the MRCI data is carrier interference Measurement report data.
  • the method further includes: locating the geographical location of the filtered abnormal cell by using engineering data and a geographic information system.
  • the screening of the abnormal cell that fails the handover includes: recording, by using a time that the handover failure occurs to the same target cell, obtaining a plurality of first time intervals in which the handover fails; And selecting, in a time interval, a plurality of first time interval sets in which the first time interval is less than or equal to the preset first time interval, that is, filtering a set of consecutive multiples that are less than or equal to the preset first time interval.
  • a time interval forming a set, filtering out multiple groups, respectively forming a plurality of first time interval sets; counting the number of first time intervals in each first time interval set, when the number of statistics exceeds the number
  • the threshold value is preset, the abnormal cell that is switched to the same target cell in the first time interval set is used as the abnormal cell that fails to be switched; wherein, when the first time interval is a handover to the same target cell, The time difference between two consecutive handover failures.
  • the screening of the abnormal cell for the ping-pong handover includes: recording, by the time when the current cell and the target cell are successfully switched, obtaining a plurality of second time intervals in which the adjacent handover succeeds; And collecting, in the second time interval, a second time interval set in which the second time interval is less than or equal to the preset second time interval; and counting the number of the second time intervals in the second time interval set, when the statistics are When the number exceeds the second preset threshold, the target cell is used as the abnormal cell for ping-pong handover; wherein the second time interval refers to that the handover between the current cell and the target cell is successful. Time difference.
  • the screening of the abnormal cell that frequently switches includes: recording by a time when no handover occurs in not less than three cells (refer to switching between the not less than three cells and the handover is successful) Obtaining a plurality of third time intervals in which the adjacent switching succeeds; and selecting, in the plurality of third time intervals, a third time interval set in which the third time interval is less than or equal to the preset third time interval; The number of the third time interval in the third time interval set is counted. When the number of statistics exceeds the third preset threshold, the abnormal cell that has not less than three cells is switched. Not less than three cells are used as abnormal cells for frequent handover; wherein the third time interval refers to a time difference between two consecutive handovers when handover occurs between not less than three cells.
  • FIG. 2 is a schematic diagram of an apparatus for optimizing an abnormality of a GSM network handover according to an embodiment of the present invention.
  • the method includes: a screening module 201 and an optimization module 202.
  • the screening module 201 is configured to filter out abnormal cells that are abnormally switched by analyzing the CDT data
  • the optimization module 202 is configured to analyze, according to the MRCI data, an abnormal reason for the abnormality of the abnormal cell that is switched abnormally.
  • the handover abnormality includes a handover failure, a ping-pong handover, and a frequent handover from the current cell handover to the target cell;
  • the CDT data is call detailed tracking data,
  • the MRCI data is carrier interferometry report data.
  • the device further includes: a positioning unit configured to locate the geographical location of the filtered abnormal cell by using engineering data and a geographic information system.
  • the screening module 201 includes: obtaining a first time interval unit, configured to record a time when a handover failure occurs to the same target cell, and obtain a plurality of first time intervals in which the adjacent handover fails; a time interval arranging unit, configured to filter, in the plurality of first time intervals, a plurality of first time interval sets in which the consecutive first time interval is less than or equal to a preset first time interval; and determine a handover failure unit, The method is configured to collect statistics on the number of the first time interval in each first time interval set, and when the number of statistics exceeds the first preset threshold, send the first time interval set to the same target cell
  • the abnormal cell in which the handover occurs is an abnormal cell that fails to be handed over; wherein the first time interval is a time difference between two consecutive handover failures when the handover occurs to the same target cell.
  • the screening module 201 further includes: obtaining a second time interval unit, configured to record, by using a time interval that the current cell and the target cell are successfully switched, to obtain a plurality of second time intervals in which the adjacent handover succeeds; a second time interval arranging unit, configured to filter, in the plurality of second time intervals, a second time interval set in which the second time interval is less than or equal to a preset second time interval; and determine a ping-pong switching unit, set to Counting the number of the second time interval in the second time interval set, and when the number of statistics exceeds the second preset threshold, using the target cell as an abnormal cell for ping-pong switching;
  • the second time interval refers to the time difference between two consecutive handover successes when a handover occurs between the current cell and the target cell.
  • the screening module 201 further includes: obtaining a third time interval unit, configured to record, by performing a handover success time in not less than three cells, to obtain an adjacent occurrence switchover. a plurality of third time intervals of the work; screening the third time interval set unit, and setting, in the plurality of third time intervals, a third time interval set in which the third time interval is less than or equal to the preset third time interval And determining a frequent switching unit, configured to count the number of the third time interval in the third time interval set, and when the counted number exceeds a third preset threshold, the switching occurs.
  • Not less than three cells are used as abnormal cells for frequent handover; wherein the third time interval refers to a time difference between two consecutive handovers when handover occurs between not less than three cells.
  • the embodiment of the present invention can analyze the cause of the handover abnormality and accurately locate the geographical location where the handover abnormality is based on the CDT data and the MRCI data, combined with the engineering data and the wireless data.
  • the CDT includes the user's detailed bill record and BSC (Base Station Controller) switching information.
  • the MRCI data includes a large amount of measurement information, that is, the switch bill is analyzed from the BSC in the CDT bill.
  • GIS Geographic Information System
  • FIG. 3 is a flowchart of a GMS network handover abnormal event analysis according to an embodiment of the present invention. As shown in FIG. 3, the method includes: data import and data preprocessing, data filtering, handover anomaly optimization analysis, and problem area location.
  • Data import and data preprocessing stage The system imports CDT data, MRCI data, engineering data and wireless data, and performs pre-processing analysis on information such as frequency optimization, interference analysis and measurement report data.
  • the data in the BSC in the CDT bill is used as the starting point of the analysis, and the abnormal cell with abnormal handover is selected.
  • the abnormal cell that switches abnormally includes handover failure, ping-pong handover, and abnormal handover of the abnormal cell from the current cell handover to the target cell.
  • Switching anomaly optimization analysis stage intelligently analyze and judge the three types of abnormal events in the handover optimization analysis, such as handover failure, ping-pong handover and frequent handover, by MRCI data, and give guidance for optimization suggestions.
  • the geographic location information of the problem cell can be located on the map determined by the engineering data.
  • the number of consecutive handover failures to the same target cell is accumulated, and the number of consecutive handover failures is greater than or equal to the first preset threshold, such as 5 times.
  • the adjacent two handover intervals of one cell pair ⁇ the preset second time interval, such as 15 seconds (the handover time interval herein refers to the time difference between two consecutive handover success events),
  • the number of times of ping-pong switching is sequentially added, and the number of ping-pong switching is greater than or equal to the second preset threshold, for example, 6 times, and no strong continuous is required.
  • the adjacent two switching intervals ⁇ the preset third time interval, such as 15 seconds (the switching time interval here refers to the time difference between two consecutive switching success events), the adjacent two Secondary cut
  • the number of frequent switchings is sequentially added, and the number of frequent switching is greater than or equal to the third preset threshold, such as 6 times.
  • For the handover data in the BSC in the CDT obtain a cell list with a low handover success rate or a large number of handover failures, or a ping-pong handover, frequent handover, and count the cell handover success rate, handover failure times, and continuous handover.
  • the number of failures, the number of dropped calls, the number of ping-pong switching, and the number of frequent switchings are the number of failures, the number of dropped calls, the number of ping-pong switching, and the number of frequent switchings.
  • the handover failure optimization analysis is to optimize the analysis of the cell that meets the handover failure threshold and the handover success threshold.
  • the handover success rate of a certain cell pair is lower than the threshold set by the user: if the cell pair relationship is in the same station relationship, the (2) check is performed, and if not, the (3) check is performed;
  • the information of each handover failure is counted, and the level of the target cell as the neighboring cell before handover is greater than the peer base station in the handover HoDetect message.
  • the above is recorded as an abnormality. If the HoDetect message of the opposite base station is not detected, it is directly recorded as an abnormality (that is, the average value of the neighboring cell level in the last four measurement reports before each switching is subtracted from each switching in the switching table in the BSC.
  • HoReserve value if the difference If the value is greater than 25db, it is considered to be an abnormality. If the HoReserve value is null, it is considered to be an abnormality.
  • Each switch is calculated as such. If the number of abnormal switch failures exceeds 80%, the execution will be (4). If not, if not If the condition is met, the judgment is performed (5);
  • the path loss algorithm find and switch the cell with the BCCH (Broadcast Control Channel) frequency of the failed target cell in the engineering data table, and the cell with the smallest path loss value of the target cell after the handover failure, if If the cell satisfies the path loss value less than (2* the maximum path loss value of the neighboring cell of the handover failure target cell), the following determination is performed: the BCCH frequency optimization analysis is performed on the cell A and the target cell B of the BCCH with the target cell, respectively.
  • BCCH Broadcast Control Channel
  • the object with the strongest output signal is suggested to be added as a potential neighbor.
  • the problem at this time is “neighbor Zone miss allocation”, give suggestions: "A can try to increase XXX as a neighboring area";
  • the frequency analysis of the carrier frequency of the switching original side is performed, and if the carrier frequency of the TCH (Traffic Channel) is frequency hopping, the frequency hopping replacement sequence of the corresponding cell TCH is indicated. It is recommended and suggested that “switching the original side carrier frequency may have interference, it is recommended to try to change the frequency point XXX”.
  • AMR Adaptive Multi-Rate Codec
  • AFS Adaptive full rate coding
  • AHS Adaptive half rate coding
  • IMSI International Mobile Subscriber Identification Number
  • IMEI International Mobile Equipment Identity
  • the IMSI is checked, and if it is the same IMSI, the problem "The user terminal may have a problem" is indicated.
  • the ping-pong switching optimization analysis is to enter the cell with more ping-pong switching times in the switching abnormal event. Line optimization analysis.
  • the average downlink level value before the handover of the cell is calculated as N1, and a suggestion is given: "The weak coverage of the area where the user is located, it is recommended to adjust the salvage level switching threshold to N1 + 2db", if the quality requirement is not met, it is not satisfied.
  • the average downlink quality before handover is less than or equal to the downlink average quality before the preset handover the problem is indicated as: “weak coverage”. If the 40% threshold requirement is not met, that is, the requirement that the sum of the downlink level emergency switching times and the number of ping-pong switching times exceeds the preset downlink level emergency switching ratio is not satisfied, the next decision is performed;
  • the uplink average quality before the preset handover is less than or equal to 1.5, the average downlink level before the handover is calculated.
  • N1 the average downlink level before the handover is calculated.
  • the 40% requirement is not met, that is, if the sum of the uplink level salvage switching times and the ping pong switching times exceeds the preset uplink level salvage switching ratio, the next decision is performed;
  • the preset downlink quality salvage handover ratio for example, 40%
  • perform frequency analysis on the carrier frequency of the cell and give a frequency optimization suggestion as “this There is a large interference in the carrier frequency. It is recommended to change the frequency point to XXX”. If the 40% requirement is not met, that is, the requirement that the sum of the downlink quality salvage handover times and the number of ping-pong handovers exceeds the preset downlink quality salvage handover ratio is not satisfied, the next decision is performed;
  • the preset uplink quality salvage handover ratio for example, 40%
  • calculate the downlink average quality before handover and if the downlink average quality before handover is less than the preset handover downlink The average quality (such as 1.5), check the IMSI where the ping-pong handover occurs. If there are multiple International Mobile Subscriber Identity (IMSI) or all IMSIs are unknown, give the suggestion that there may be uplink interference in the area, or the cell repeater exists.
  • IMSI International Mobile Subscriber Identity
  • the IMSI is unique and non-unknown, it indicates that “the XXXX IMSI user terminal may have a problem”; if the number of uplink quality salvage handovers does not exceed the preset uplink quality salvage To switch the ratio request, execute the next decision;
  • the preset level value such as 3db, is determined as follows:
  • the link and downlink average level link difference before switching (calculation for each measurement report) If the link is poor, considering the impact of the power control, it is greater than or equal to the link value of the uplink and downlink average level before the preset switch (such as 15db), then give a suggestion: "The link of the cell is not balanced, it is recommended to check the feeder port connection", if If the link difference between the uplink and downlink average level before the handover is greater than or equal to the link value of the uplink and downlink average level before the preset handover (such as 15 db), the average uplink quality before the handover is calculated, if it is less than or equal to the uplink average quality before the preset handover ( For example, 1.5), the average downlink level value N1 before the cell handover is calculated, and the suggestion is: "It is recommended to adjust the salvage uplink level switching threshold
  • the preset uplink quality salvage handover ratio for example, 40%
  • calculate the downlink average quality before handover and if the downlink average quality before handover is less than the preset handover downlink The average quality (such as 1.5)
  • check the IMSI of the ping-pong handover if there are multiple IMSIs or all the IMSIs are unknown, then give a suggestion: "There may be uplink interference in the area, or there is a hidden fault recommendation in the cell repeater", If the IMSI is unique and not unknown, the problem is indicated: "The XXXX IMSI user terminal may have a problem"; if the uplink is not met If the sum of the quality salvage switching times and the number of ping-pong switching times exceeds the preset uplink quality salvage switching ratio, the following determination is performed:
  • the switching of the original cell is 900, the sum of the number of macro-pitch switching ping-pong switching times in the ping-pong switching of a certain 1800 cell exceeds the preset macro-switching ratio (such as 40%), check whether the standard PBGT is for the 900 cell.
  • the applicable level of the handover (PbgtHoLayer) (referred to as the hierarchy) is set to the first level preset value (such as 11), and whether the level of the adjacent 1800 cell of the ping-pong handover is set to the second level preset value (such as 3), if not Suggestions are given: "The parameter settings are incorrect. Please set PbgtHoLayer to 11 and the neighbor cell level to 3".
  • the downlink quality switching ratio (the ratio of the switching quality of the downlink quality to the ping-pong switching) exceeds the preset downlink quality switching ratio (such as 40%), then Switching the target carrier frequency for frequency optimization analysis, and giving suggestions: "There is strong interference in the 1800 carrier frequency, it is recommended to change the frequency to XXX", if the downlink level salvage switching ratio (downstream level salvage caused by switching)
  • the ratio of the ping-pong switching that is, the ratio of the downlink level salvage switching times to the number of ping-pong switching times) exceeds the preset downlink level salvage switching ratio (such as 40%), and automatically enters (2) determination.
  • the uplink level switching ratio ie, the ratio of the switching caused by the uplink level to the ping-pong switching
  • the preset uplink level switching ratio eg, 40%
  • the switching original cell is 900
  • the ratio of the PBGT switching to the ping-pong switching times in the ping-pong switching of the 1800 cell is less than the preset PBGT switching ratio (for example, 40%)
  • the 1800 reverse-cut 900 is checked.
  • the reason for the handover of the cell is that if the proportion of the PBGT exceeds 40%, the level difference between the level of the neighboring cell and the serving cell of the 900 cell of the 1800 cell before the average handover of 1800 is switched to 900, and the average value N2 is obtained, and a suggestion is given:
  • the setting of the 1800-900 reverse PBGT switching threshold is too small. It is recommended to change the PBGT threshold parameter value of the switching cell to N2+2DB.
  • the frequency optimization analysis is performed on the target carrier frequency of the handover, and a suggestion is given that “the carrier frequency of the 1800 carrier has strong interference, and it is recommended to change the frequency to XXX. If the downlink level salvage switching ratio exceeds the preset downlink level salvage switching ratio (such as 40%), it will automatically enter (2) decision. If the uplink level switching ratio exceeds the preset uplink level switching ratio (such as 40%), it is recommended that: “The target carrier frequency link is not balanced seriously, it is recommended to check the uplink connection”;
  • the general reason for frequent handover is the same as that of ping-pong switching. The only difference is to eliminate the relevant decision of the antenna connection (ie, the (2) decision condition in the ping-pong handover), and filter the list of cells with frequent frequent handover times by switching the abnormal events. Conditional cells are optimized for analysis. Since the algorithm is similar to the condition of the ping-pong switching decision (1), it will not be described here.
  • the BSC intra-switching data in the CDT data is aggregated and analyzed to obtain information such as the number of handover failures, the handover success rate, the number of handovers, the number of consecutive handover failures, the number of frequent handovers, and the number of ping-pong handovers.
  • the number of handover anomalies is relatively large, and then the parameter value of the handover analysis is set, and each cell pair of 29-1-1 is the handover target cell is separately optimized, and the following analysis result is obtained: 29-274-3 When the cell switches to 29-1-1, frequent handover occurs.
  • the problem analyzed is “no master coverage”.
  • the suggestion is “modify the PBGT of the 29-274-3 and 29-1-1 cell pairs to 10db”
  • the 29-1-2 cell switches to 29-1-1, and the ping-pong switch occurs.
  • the problem analyzed is "no master coverage”.
  • the suggestion is "modify the 29-1-2 and 29-1-1 cell pairs.
  • the PBGT is 10 db", and the 29-144-3 cell switches to 29-1-1.
  • the problem is that the weak handover is performed.
  • the suggestion is to modify the downlink switch of 29-144-3.
  • the threshold is -84db", and the 29-144-3 cell with weak coverage can be located on the map. Correlation Analysis.
  • the embodiment of the present invention combines engineering data and wireless data based on CDT and MRCI data. Correlation analysis is carried out from multiple dimensions such as handover failure, ping-pong handover and frequent handover. The opinions and suggestions of network optimization guidance are given, and the location of handover failure can be located on the map to assist network optimization engineers to quickly find problems and improve The user experience and save a lot of time.
  • the association analysis is performed from multiple dimensions such as handover failure, ping-pong handover and frequent handover, and the network optimization guidance is given. And suggestions, and can locate the location of the switch failure on the map to assist the network optimization engineer to quickly find the problem, improve the user experience, and save a lot of time.

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Abstract

本发明实施例公开了一种GSM网络切换异常的优化方法及装置,所述方法包括以下步骤:通过对CDT数据进行分析,筛选出切换异常的异常小区;根据MRCI数据,对所获得的切换异常的异常小区的切换异常原因进行分析,得到切换异常原因及解决切换异常的优化建议;其中,所述切换异常包括从当前小区切换到目标小区的切换失败、乒乓切换以及频繁切换;其中,所述CDT数据是呼叫详细跟踪数据,所述MRCI数据是载波干涉测量报告数据。

Description

一种GSM网络切换异常的优化方法及装置 技术领域
本文涉及移动通信技术领域,尤其涉及一种GSM(Global System for Mobile Communications,全球移动通信系统)网络切换异常的优化方法及装置。
背景技术
随着无线网络的快速发展,运营商之间在网络通话质量、问题定位手段和响应速度等方面的优劣成为争夺用户的关键。切换是移动用户在通话过程中从一个话务信道转到另一个话务信道的过程,切换成功是保证移动终端在通话过程中可以随时移动而保持通话连续的前提,是移动网络优势的主要体现。切换成功率是网络质量的一项重要指标,是用户感知度最直接的体现,提高网络切换成功率,对改善网络质量具有非常重要的作用。传统的切换异常原因的分析方法主要基于网络优化工程师的经验,解决方法单一并且周期较长,同时问题定位不够准确。因此,需要一种综合多种数据联合分析的方法。
传统切换异常原因的分析方法一般都是通过以下一些原因来推测和查看切换异常的问题,包括:不发起切换问题、硬件故障引起的切换失败问题和数据配置不合理引起的切换失败问题等。传统的分析方法,都是从工作经验出发逐条排查问题的原因,无法全面快速优化。
发明内容
本发明实施例提供一种GSM网络切换异常的优化方法及装置,解决了相关技术从工作经验出发逐条排查问题的原因,无法全面快速优化的问题。
本发明实施例提供了一种GSM网络切换异常的优化方法,包括以下步骤:
通过对CDT(Call Detail Trace,呼叫详细跟踪)数据进行分析,筛选出 切换异常的异常小区;
根据MRCI(Measure Report Carrier Interference,载波干涉测量报告)数据,对所获得的切换异常的异常小区的切换异常原因进行分析,得到切换异常原因及解决切换异常的优化建议;
其中,所述切换异常包括从当前小区切换到目标小区的切换失败、乒乓切换以及频繁切换;
其中,所述CDT数据是呼叫详细跟踪数据,所述MRCI数据是载波干涉测量报告数据。
可选地,所述方法还包括:
通过工程数据和地理信息系统对所筛选出的异常小区的地理位置进行定位。
可选地,所述切换异常为从当前小区切换到目标小区的切换失败,所述筛选出切换异常的异常小区包括:
通过对向同一目标小区发生切换失败的时间进行记录,得到相邻的发生切换失败的多个第一时间间隔;
在所述多个第一时间间隔中筛选出连续的第一时间间隔小于等于预设的第一时间间隔的多个第一时间间隔集合;
对所述每个第一时间间隔集合中的第一时间间隔的个数进行统计,当所统计的个数超过第一预设门限值时,将所述第一时间间隔集合中向同一目标小区发生切换的异常小区作为切换失败的异常小区;
其中,所述第一时间间隔是指向同一目标小区发生切换时,相邻两次切换失败的时间差。
可选地,所述切换异常为从当前小区切换到目标小区的乒乓切换,所述筛选出切换异常的异常小区包括:
通过对当前小区和目标小区发生切换成功的时间进行记录,得到相邻的发生切换成功的多个第二时间间隔;
在所述多个第二时间间隔中筛选出第二时间间隔小于等于预设的第二时 间间隔的第二时间间隔集合;
对所述第二时间间隔集合中第二时间间隔的个数进行统计,当所统计的个数超过第二预设门限值时,将目标小区作为乒乓切换的异常小区;
其中,所述第二时间间隔是指当前小区与目标小区之间发生切换时,相邻两次切换成功的时间差。
可选地,所述切换异常为从当前小区切换到目标小区的频繁切换,所述筛选出切换异常的异常小区包括:
通过对不少于三个小区中发生切换成功的时间进行记录,得到相邻的发生切换成功的多个第三时间间隔;
在所述多个第三时间间隔中筛选出第三时间间隔小于等于预设的第三时间间隔的第三时间间隔集合;
对所述第三时间间隔集合中第三时间间隔的个数进行统计,当所统计的个数超过第三预设门限值时,将所述发生切换的不少于三个小区作为频繁切换的异常小区;
其中,所述第三时间间隔是指不少于三个小区之间发生切换时,相邻两次切换成功的时间差。
可选地,所述切换异常为从当前小区切换到目标小区的乒乓切换或频繁切换,所述根据MRCI数据,对所获得的切换异常的异常小区的切换异常原因进行分析,得到切换异常原因及解决切换异常的优化建议,包括:
所述切换异常发生在同频段间,计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动小于等于第一预设电平值,进行以下判定:
判断下行电平紧急切换次数占异常切换次数之和比如果超过预设下行电平紧急切换比例,且切换前下行平均质量小于等于预设切换前下行平均质量,则给出优化建议:用户所处区域弱覆盖,建议调整挽救性电平切换门限,如果不满足切换前下行平均质量小于等于预设切换前下行平均质量,则指出问题为:弱覆盖,如果下行电平紧急切换次数占异常切换次数之和比没有超过预设下行电平紧急切换比例,则执行以下判定:
判断上行电平挽救性切换次数占异常切换次数之和比如果超过预设上行电平挽救性切换比例,且切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则给出优化建议:该小区链路不均衡,建议排查馈线口连接;如果不满足切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则计算切换前平均上行质量,如果小于等于预设切换前上行平均质量,则给出优化建议:建议调整挽救性上行电平切换门限;如果不满足上行电平挽救性切换次数占异常切换次数之和比超过预设上行电平挽救性切换比例,则执行以下判定:
判断下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则对于该小区的载频进行频率分析,给出优化建议:该载频存在较大干扰,建议更换频点;如果不满足下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则执行以下判定:
判断上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,计算切换前下行平均质量,如果切换前下行平均质量小于预设切换前下行平均质量,检查异常切换发生的国际移动用户识别码IMSI,如果存在多个IMSI或所有IMSI为未知,则给出优化建议:该区域可能存在上行干扰,或小区直放站存在隐性故障建议排查,如果IMSI唯一且非未知,则指出问题为:该IMSI用户终端可能存在问题;如果不满足上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,则执行以下判定:
判断功率预算PBGT切换次数占异常切换次数之和比超过预设功率预算切换比例,给出优化建议:所处区域为无主覆盖,建议修改小区间的PBGT门限参数值。
可选地,所述切换异常为从当前小区切换到目标小区的乒乓切换,如果还没有得到切换异常原因及解决切换异常的优化建议,所述方法还包括:
计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动大于等于第二预设电平值,检查该小区其他同站小区是否存在切换前后电平差平均波动大于等于所述第二预设电平值的现象,如果有,则指出问题为:该小区存在鸳鸯馈线问题;如果没有,则检查同小区 的其他载频是否有此现象,如果没有,则给出优化建议:该载频存在发射功率不稳的隐性故障,建议排查,如果有,则给出优化建议:该小区的馈线接口松动,需要排查。
可选地,所述切换异常为从当前小区切换到目标小区的乒乓切换或频繁切换,所述根据MRCI数据,对所获得的切换异常的异常小区的切换异常原因进行分析,得到切换异常原因及解决切换异常的优化建议,包括:
所述切换异常发生在异频段间,计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动小于等于第一预设电平值,进行以下判定:
判断下行电平紧急切换次数占异常切换次数之和比超过预设下行电平紧急切换比例,且切换前下行平均质量小于等于预设切换前下行平均质量,则给出优化建议:用户所处区域弱覆盖,建议调整挽救性电平切换门限,如果不满足切换前下行平均质量小于等于预设切换前下行平均质量,则指出问题为“弱覆盖”。若不满足下行电平紧急切换次数占异常切换次数之和比超过预设下行电平紧急切换比例,则执行以下判定:
判断上行电平挽救性切换次数占异常切换次数之和比如果超过预设上行电平挽救性切换比例,且切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则给出优化建议:该小区链路不均衡,建议排查馈线口连接;如果不满足切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则计算切换前平均上行质量,如果小于等于预设切换前上行平均质量,则给出优化建议:建议调整挽救性上行电平切换门限;如果不满足上行电平挽救性切换次数占异常切换次数之和比超过预设上行电平挽救性切换比例,则执行以下判定:
判断下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则对于该小区的载频进行频率分析,给出优化建议:该载频存在较大干扰,建议更换频点;如果不满足下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则执行以下判定:
判断上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,计算切换前下行平均质量,如果切换前下行平均质量小于 预设切换前下行平均质量,检查异常切换发生的国际移动用户识别码IMSI,如果存在多个IMSI或所有IMSI为未知,则给出优化建议:该区域可能存在上行干扰,或小区直放站存在隐性故障建议排查,如果IMSI唯一且非未知,则指出问题为:该IMSI用户终端可能存在问题;如果不满足上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,则执行以下判定:
判断如果当前小区对目标小区的异常切换中宏微切换占异常切换次数之和比超过预设宏微切换比例,检查当前小区的标准PBGT切换适用的层次是否设置为第一层次预设值,目标小区的标准PBGT切换适用的层次是否设置为第二层次预设值,如果不是,则给出优化建议:参数设置有误;如果是,则判断如果下行质量切换比例超过预设下行质量切换比例,则对目标小区载频进行频率优化分析,并给出优化建议:目标小区载频存在较强干扰,建议频点更换;判断如果上行电平切换比例超过预设上行电平切换比例,则给出优化建议:目标小区载频链路不均衡严重,建议检查上行链路连接;
判断如果当前小区对目标小区的异常切换中PBGT切换占异常切换次数之和比超过预设PBGT切换比例,则给出优化建议:目标小区到当前小区反向PBGT切换门限设置过小;判断如果下行质量切换比例超过预设下行质量切换比例,则对目标小区载频进行频率优化分析,并给出优化建议:目标小区载频存在较强干扰,建议频点更换;判断如果上行电平切换比例超过预设上行电平切换比例,则给出优化建议:目标小区载频链路不均衡严重,建议检查上行链路连接;
其中当前小区频段为900,目标小区频段为1800。
可选地,所述切换异常为从当前小区切换到目标小区的乒乓切换,如果还没有得到切换异常原因及解决切换异常的优化建议,所述方法还包括:
计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动大于等于第二预设电平值,检查该小区其他同站小区是否存在切换前后电平差平均波动大于等于所述第二预设电平值的现象,如果有,则指出问题为:该小区存在鸳鸯馈线问题;如果没有,则检查同小区的其他载频是否有此现象,如果没有,则给出优化建议:该载频存在发射功 率不稳的隐性故障,建议排查,如果有,则给出优化建议:该小区的馈线接口松动,需要排查。
本发明实施例还提供了一种GSM网络切换异常的优化装置,包括:
筛选模块,设置为通过对CDT数据进行分析,筛选出切换异常的异常小区;以及
优化模块,设置为根据MRCI数据,对所获得的切换异常的异常小区的切换异常原因进行分析,得到切换异常原因及解决切换异常的优化建议;
其中,所述切换异常包括从当前小区切换到目标小区的切换失败、乒乓切换以及频繁切换;
其中,所述CDT数据是呼叫详细跟踪数据,所述MRCI数据是载波干涉测量报告数据。
可选地,所述装置还包括:定位单元,设置为通过工程数据和地理信息系统对所筛选出的异常小区的地理位置进行定位。
可选地,所述筛选模块包括:
获得第一时间间隔单元,设置为通过对向同一目标小区发生切换失败的时间进行记录,得到相邻的发生切换失败的多个第一时间间隔;
筛选第一时间间隔集合单元,设置为在所述多个第一时间间隔中筛选出连续的第一时间间隔小于等于预设的第一时间间隔的多个第一时间间隔集合;以及
确定切换失败单元,设置为对每个第一时间间隔集合中的第一时间间隔的个数进行统计,当所统计的个数超过第一预设门限值时,将所述第一时间间隔集合中向同一目标小区发生切换的异常小区作为切换失败的异常小区;
其中,所述第一时间间隔是指向同一目标小区发生切换时,相邻两次切换失败的时间差。
可选地,所述筛选模块包括:
获得第二时间间隔单元,设置为通过对当前小区和目标小区发生切换成 功的时间进行记录,得到相邻的发生切换成功的多个第二时间间隔;
筛选第二时间间隔集合单元,设置为在所述多个第二时间间隔中筛选出第二时间间隔小于等于预设的第二时间间隔的第二时间间隔集合;以及
确定乒乓切换单元,设置为对所述第二时间间隔集合中的第二时间间隔的个数进行统计,当所统计的个数超过第二预设门限值时,将目标小区作为乒乓切换的异常小区;
其中,所述第二时间间隔是指当前小区与目标小区之间发生切换时,相邻两次切换成功的时间差。
可选地,所述筛选模块包括:
获得第三时间间隔单元,设置为通过对不少于三个小区中发生切换成功的时间进行记录,得到相邻的发生切换成功的多个第三时间间隔;
筛选第三时间间隔集合单元,设置为在所述多个第三时间间隔中筛选出第三时间间隔小于等于预设的第三时间间隔的第三时间间隔集合;以及
确定频繁切换单元,设置为对所述第三时间间隔集合中第三时间间隔的个数进行统计,当所统计的个数超过第三预设门限值时,将所述发生切换的不少于三个小区作为频繁切换的异常小区;
其中,所述第三时间间隔是指不少于三个小区之间发生切换时,相邻两次切换成功的时间差。
可选地,所述切换异常为从当前小区切换到目标小区的乒乓切换或频繁切换,所述优化模块是设置为:判断所述切换异常发生在同频段间,计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动小于等于第一预设电平值,进行以下判定:
判断下行电平紧急切换次数占异常切换次数之和比如果超过预设下行电平紧急切换比例,且切换前下行平均质量小于等于预设切换前下行平均质量,则给出优化建议:用户所处区域弱覆盖,建议调整挽救性电平切换门限,如果不满足切换前下行平均质量小于等于预设切换前下行平均质量,则指出问题为:弱覆盖,如果下行电平紧急切换次数占异常切换次数之和比没有超过预设下行电平紧急切换比例,则执行以下判定:
判断上行电平挽救性切换次数占异常切换次数之和比如果超过预设上行电平挽救性切换比例,且切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则给出优化建议:该小区链路不均衡,建议排查馈线口连接;如果不满足切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则计算切换前平均上行质量,如果小于等于预设切换前上行平均质量,则给出优化建议:建议调整挽救性上行电平切换门限;如果不满足上行电平挽救性切换次数占异常切换次数之和比超过预设上行电平挽救性切换比例,则执行以下判定:
判断下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则对于该小区的载频进行频率分析,给出优化建议:该载频存在较大干扰,建议更换频点;如果不满足下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则执行以下判定:
判断上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,计算切换前下行平均质量,如果切换前下行平均质量小于预设切换前下行平均质量,检查异常切换发生的国际移动用户识别码IMSI,如果存在多个IMSI或所有IMSI为未知,则给出优化建议:该区域可能存在上行干扰,或小区直放站存在隐性故障建议排查,如果IMSI唯一且非未知,则指出问题为:该IMSI用户终端可能存在问题;如果不满足上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,则执行以下判定:
判断功率预算PBGT切换次数占异常切换次数之和比超过预设功率预算切换比例,给出优化建议:所处区域为无主覆盖,建议修改小区间的PBGT门限参数值。
可选地,所述切换异常为从当前小区切换到目标小区的乒乓切换,所述优化模块还设置为:在还未得到切换异常原因及解决切换异常的优化建议时,执行以下判定:
计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动大于等于第二预设电平值,检查该小区其他同站小区是否存在切换前后电平差平均波动大于等于所述第二预设电平值的现象,如 果有,则指出问题为:该小区存在鸳鸯馈线问题;如果没有,则检查同小区的其他载频是否有此现象,如果没有,则给出优化建议:该载频存在发射功率不稳的隐性故障,建议排查,如果有,则给出优化建议:该小区的馈线接口松动,需要排查。
可选地,所述切换异常为从当前小区切换到目标小区的乒乓切换或频繁切换,所述优化模块是设置为:判断所述切换异常发生在异频段间,计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动小于等于第一预设电平值,进行以下判定:
判断下行电平紧急切换次数占异常切换次数之和比超过预设下行电平紧急切换比例,且切换前下行平均质量小于等于预设切换前下行平均质量,则给出优化建议:用户所处区域弱覆盖,建议调整挽救性电平切换门限,如果不满足切换前下行平均质量小于等于预设切换前下行平均质量,则指出问题为“弱覆盖”。若不满足下行电平紧急切换次数占异常切换次数之和比超过预设下行电平紧急切换比例,则执行以下判定:
判断上行电平挽救性切换次数占异常切换次数之和比如果超过预设上行电平挽救性切换比例,且切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则给出优化建议:该小区链路不均衡,建议排查馈线口连接;如果不满足切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则计算切换前平均上行质量,如果小于等于预设切换前上行平均质量,则给出优化建议:建议调整挽救性上行电平切换门限;如果不满足上行电平挽救性切换次数占异常切换次数之和比超过预设上行电平挽救性切换比例,则执行以下判定:
判断下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则对于该小区的载频进行频率分析,给出优化建议:该载频存在较大干扰,建议更换频点;如果不满足下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则执行以下判定:
判断上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,计算切换前下行平均质量,如果切换前下行平均质量小于预设切换前下行平均质量,检查异常切换发生的国际移动用户识别码IMSI, 如果存在多个IMSI或所有IMSI为未知,则给出优化建议:该区域可能存在上行干扰,或小区直放站存在隐性故障建议排查,如果IMSI唯一且非未知,则指出问题为:该IMSI用户终端可能存在问题;如果不满足上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,则执行以下判定:
判断如果当前小区对目标小区的异常切换中宏微切换占异常切换次数之和比超过预设宏微切换比例,检查当前小区的标准PBGT切换适用的层次是否设置为第一层次预设值,目标小区的标准PBGT切换适用的层次是否设置为第二层次预设值,如果不是,则给出优化建议:参数设置有误;如果是,则判断如果下行质量切换比例超过预设下行质量切换比例,则对目标小区载频进行频率优化分析,并给出优化建议:目标小区载频存在较强干扰,建议频点更换;判断如果上行电平切换比例超过预设上行电平切换比例,则给出优化建议:目标小区载频链路不均衡严重,建议检查上行链路连接;
判断如果当前小区对目标小区的异常切换中PBGT切换占异常切换次数之和比超过预设PBGT切换比例,则给出优化建议:目标小区到当前小区反向PBGT切换门限设置过小;判断如果下行质量切换比例超过预设下行质量切换比例,则对目标小区载频进行频率优化分析,并给出优化建议:目标小区载频存在较强干扰,建议频点更换;判断如果上行电平切换比例超过预设上行电平切换比例,则给出优化建议:目标小区载频链路不均衡严重,建议检查上行链路连接;
其中当前小区频段为900,目标小区频段为1800。
可选地,所述切换异常为从当前小区切换到目标小区的乒乓切换,所述优化模块还设置为:在还未得到切换异常原因及解决切换异常的优化建议时,执行以下判定:
计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动大于等于第二预设电平值,检查该小区其他同站小区是否存在切换前后电平差平均波动大于等于所述第二预设电平值的现象,如果有,则指出问题为:该小区存在鸳鸯馈线问题;如果没有,则检查同小区的其他载频是否有此现象,如果没有,则给出优化建议:该载频存在发射功 率不稳的隐性故障,建议排查,如果有,则给出优化建议:该小区的馈线接口松动,需要排查。
本发明实施例还提供一种计算机可读存储介质,存储有程序指令,当该程序指令被执行时可实现上述方法。
本发明实施例从切换异常事件出发,以CDT和MRCI数据为基础,结合工程数据和无线数据,从切换失败、乒乓切换和频繁切换等多个维度进行关联分析,给出网络优化指导的意见及建议,并能将切换失败的位置在地图上进行定位,以辅助网络优化工程师快速查找问题,提高了用户体验,并节省了大量的时间。
附图概述
图1是本发明实施例提供的一种GSM网络切换异常的优化方法的流程图;
图2是本发明实施例提供的一种GSM网络切换异常的优化装置的示意图;
图3是本发明实施例提供的GMS网络切换异常事件分析的流程图。
本发明的实施方式
图1显示了本发明实施例提供的一种GSM网络切换异常的优化方法的流程图,如图1所示,包括以下步骤:
步骤S101:通过对CDT数据进行分析,筛选出切换异常的异常小区;
步骤S102:根据MRCI数据,对所获得的切换异常的异常小区的切换异常原因进行分析,得到切换异常原因及解决切换异常的优化建议;
其中,所述切换异常包括从当前小区切换到目标小区的切换失败、乒乓切换以及频繁切换;
其中,所述CDT数据是呼叫详细跟踪数据,所述MRCI数据是载波干涉 测量报告数据。
可选地,上述方法还包括:通过工程数据和地理信息系统对所筛选出的异常小区的地理位置进行定位。
在一个实施例中,筛选出切换失败的异常小区包括:通过对向同一目标小区发生切换失败的时间进行记录,得到相邻的发生切换失败的多个第一时间间隔;在所述多个第一时间间隔中筛选出连续的第一时间间隔小于等于预设的第一时间间隔的多个第一时间间隔集合,即筛选出一组连续的小于等于预设的第一时间间隔的多个第一时间间隔,组成一个集合,筛选出多组,分别组成多个第一时间间隔集合;对每个第一时间间隔集合中的第一时间间隔的个数进行统计,当所统计的个数超过第一预设门限值时,将所述第一时间间隔集合中向同一目标小区发生切换的异常小区作为切换失败的异常小区;其中,所述第一时间间隔是指向同一目标小区发生切换时,相邻两次切换失败的时间差。
在一个实施例中,筛选出乒乓切换的异常小区包括:通过对当前小区和目标小区发生切换成功的时间进行记录,得到相邻的发生切换成功的多个第二时间间隔;在所述多个第二时间间隔中筛选出第二时间间隔小于等于预设的第二时间间隔的第二时间间隔集合;对所述第二时间间隔集合中的第二时间间隔的个数进行统计,当所统计的个数超过第二预设门限值时,将目标小区作为乒乓切换的异常小区;其中,所述第二时间间隔是指当前小区与目标小区之间发生切换时,相邻两次切换成功的时间差。
在一个实施例中,筛选出频繁切换的异常小区包括:通过对不少于三个小区中发生切换成功(指在所述不少于三个小区之间进行切换且切换成功)的时间进行记录,得到相邻的发生切换成功的多个第三时间间隔;在所述多个第三时间间隔中筛选出第三时间间隔小于等于预设的第三时间间隔的第三时间间隔集合;对所述第三时间间隔集合中第三时间间隔的个数进行统计,当所统计的个数超过第三预设门限值时,将不少于三个小区中发生切换的异常小区即所述发生切换的不少于三个小区作为频繁切换的异常小区;其中,所述第三时间间隔是指不少于三个小区之间发生切换时,相邻两次切换成功的时间差。
图2显示了本发明实施例提供的一种GSM网络切换异常的优化装置的示意图,如图2所示,包括:筛选模块201和优化模块202。所述筛选模块201,设置为通过对CDT数据进行分析,筛选出切换异常的异常小区;所述优化模块202,设置为根据MRCI数据,对所获得的切换异常的异常小区的切换异常原因进行分析,得到切换异常原因及解决切换异常的优化建议;其中,所述切换异常包括从当前小区切换到目标小区的切换失败、乒乓切换以及频繁切换;其中,所述CDT数据是呼叫详细跟踪数据,所述MRCI数据是载波干涉测量报告数据。
可选地,所述装置还包括:定位单元,设置为通过工程数据和地理信息系统对所筛选出的异常小区的地理位置进行定位。
其中,所述筛选模块201包括:获得第一时间间隔单元,设置为通过对向同一目标小区发生切换失败的时间进行记录,得到相邻的发生切换失败的多个第一时间间隔;筛选第一时间间隔集合单元,设置为在所述多个第一时间间隔中筛选出连续的第一时间间隔小于等于预设的第一时间间隔的多个第一时间间隔集合;以及,确定切换失败单元,设置为对每个第一时间间隔集合中的第一时间间隔的个数进行统计,当所统计的个数超过第一预设门限值时,将所述第一时间间隔集合中向同一目标小区发生切换的异常小区作为切换失败的异常小区;其中,所述第一时间间隔是指向同一目标小区发生切换时,相邻两次切换失败的时间差。
其中,所述筛选模块201还包括:获得第二时间间隔单元,设置为通过对当前小区和目标小区发生切换成功的时间进行记录,得到相邻的发生切换成功的多个第二时间间隔;筛选第二时间间隔集合单元,设置为在所述多个第二时间间隔中筛选出第二时间间隔小于等于预设的第二时间间隔的第二时间间隔集合;以及,确定乒乓切换单元,设置为对所述第二时间间隔集合中的第二时间间隔的个数进行统计,当所统计的个数超过第二预设门限值时,将目标小区作为乒乓切换的异常小区;其中,所述第二时间间隔是指当前小区与目标小区之间发生切换时,相邻两次切换成功的时间差。
其中,所述筛选模块201还包括:获得第三时间间隔单元,设置为通过对不少于三个小区中发生切换成功的时间进行记录,得到相邻的发生切换成 功的多个第三时间间隔;筛选第三时间间隔集合单元,设置为在所述多个第三时间间隔中筛选出第三时间间隔小于等于预设的第三时间间隔的第三时间间隔集合;以及,确定频繁切换单元,设置为对所述第三时间间隔集合中第三时间间隔的个数进行统计,当所统计的个数超过第三预设门限值时,将所述发生切换的不少于三个小区作为频繁切换的异常小区;其中,所述第三时间间隔是指不少于三个小区之间发生切换时,相邻两次切换成功的时间差。
本发明实施例通过以CDT数据和MRCI数据为基础,并结合工程数据和无线数据,可详细分析切换异常的原因和准确定位发生切换异常的地理位置。其中,CDT包含了用户详细的话单记录和BSC(Base Station Controller,基站控制器)切换信息,MRCI数据包括了大量的测量信息,也就是说,从CDT话单中的BSC内切换话单分析出切换异常小区,并通过MRCI数据对切换异常的切换失败、乒乓切换和频繁切换等三个纬度的综合分析,最终得出切换异常发生的位置和网络优化的建议,并能通过GIS(Geographic Information System,地理信息系统)在地图上定位切换异常的位置,以辅助网络优化工程师快速查找问题。
图3显示了本发明实施例提供的GMS网络切换异常事件分析的流程图,如图3所示,包括:数据导入及数据预处理、数据筛选、切换异常优化分析、问题区域定位四个阶段。
数据导入和数据预处理阶段:系统将CDT数据、MRCI数据、工程数据以及无线数据进行导入,并对其中频点优化、干扰分析和测量报告数据等信息进行预处理分析。
数据筛选阶段:以CDT话单中BSC内切换数据为分析起点,筛选出切换异常的异常小区。所述切换异常的异常小区包括从当前小区切换到目标小区的切换失败、乒乓切换以及频繁切换的异常小区。
切换异常优化分析阶段:通过MRCI数据对切换优化分析中的切换失败、乒乓切换、频繁切换三类异常事件进行智能分析判断,给出优化建议指导。
问题区域定位阶段:完成切换异常事件的详细分析之后,根据问题小区的地理位置信息可定位到由工程数据确定的地图上。
其中,区分切换失败、乒乓切换以及频繁切换这三种异常切换的方法:
一个话单中,切换次数会很多,一个话单符合全部三种场景的情况下的处理方式:
1)先进行切换失败的记录提取,分析是否满足连续切换失败,若有多个切换失败目标小区,则分别进行切换失败统计;
2)然后进行乒乓切换的数据提取,分析是否存在乒乓切换;
3)最后剩余的切换中分析是否有频繁切换。
下面详细说明下切换失败、乒乓切换以及频繁切换这三种切换异常的判断依据:
1、切换失败:
1)向同一个目标小区连续切换失败,中间不存在向其他小区的切换,不管成功或者失败;也不存在向该目标小区的成功切换,且切换失败之间的时间间隔<=预设的第一时间间隔,如15秒(此处所述切换时间间隔是指相邻两次切换失败事件之间的时间差);
2)一个话单中,对向同一个目标小区连续发生切换失败的次数进行累加,且连续切换失败次数大于等于第一预设门限值,如5次。
2、乒乓切换:
1)如果一个小区对的相邻两次切换间隔<=预设的第二时间间隔,如15秒(此处所述切换时间间隔是指相邻两次切换成功事件之间的时间差),该相邻的两次切换计数为一次乒乓切换。例如:A->B->A的切换,A->B切换完成时间与B->A切换完成时间差<=15秒,则这两次切换记为一次乒乓切换(仅限于一个小区对之间的切换才算乒乓切换);
2)在同一个话单中,依次累加得到乒乓切换的次数,且乒乓切换次数大于等于第二预设门限值,如6次,不需要强连续。
3、频繁切换:
1)如果相邻两次切换间隔<=预设的第三时间间隔,如15秒(此处所述切换时间间隔是指相邻两次切换成功事件之间的时间差),该相邻的两次切 换计数为一次频繁切换。例如:A->B->C的切换,A->B切换完成时间与B->C切换完成时间差<=15秒,则这两次切换记为一次频繁切换;
2)上述切换中,参与全部频繁切换的小区数目>=3;
3)在同一个话单中,依次累加得到频繁切换的次数,且频繁切换次数大于等于第三预设门限值,如6次。
下面详细描述GSM网络切换异常事件的分析及优化过程:
针对CDT中的BSC内切换数据,获取切换成功率较低,或者切换失败次数较多,或者乒乓切换、频繁切换较多的小区列表,并统计出小区的切换成功率、切换失败次数、连续切换失败次数、切换失败掉话次数、乒乓切换次数、频繁切换次数等指标。
一、切换失败优化分析是对于满足切换失败次数门限和切换成功率门限条件的小区进行优化分析。
(1)对指定的切换失败小区进行分析,关联到切换失败对象分布,按切换失败次数排序,先计算该小区的总切换失败次数/切换源小区数,得到平均每小区切换失败次数,然后筛选出切换失败次数大于平均每小区切换失败次数的小区对。当某一小区对间的切换成功率低于用户设置的门限时:如果该小区对关系为同站关系,则执行(2)检查,如果不是,则执行(3)检查;
(2)对该目标小区的所有切换对之间的成功率进行检查(即统计所有和目标小区发生切换的小区的切换成功率),目标小区不变。如果除同站小区间关系外的切入成功率存在大于95%的对象且同站间切入成功率均低于90%(即如果非同站小区间切换成率至少有一个大于95%,并且同站间小区切换成功率全部小于90%),则给出分析建议“可能存在时钟异常,建议更换CC板”。如果不满足条件,则执行(3)判断。
(3)对当前分析的小区对的所有切换失败的现象,统计每一次切换失败的信息,切换前目标小区作为邻区对象中的电平大于切换HoDetect消息中的对端基站检测上行电平25db以上记为一次异常,如果检测不到对端基站HoDetect消息则直接记为一次异常(即统计每次切换前最后四条测量报告中邻区电平的平均值减去BSC内切换表中每次切换的HoReserve值,如果该差 值大于25db,认为一次异常,如果HoReserve值为空,也认为是一次异常,每次切换均这样计算),异常切换失败次数占切换失败次数比例大于80%时则执行(4)判断,如果不满足条件则执行(5)判断;
(4)根据路损算法,在工程数据表中寻找和切换失败目标小区同BCCH(Broadcast Control Channel,广播控制信道)频点的小区,并且距离切换失败目标小区路损值最小的小区,如果该小区满足路损值小于(2*切换失败目标小区的邻区的最大路损值),则执行以下判定:对和目标小区同BCCH的小区A和该目标小区B分别进行BCCH频率优化分析,对比两个载频的优化后频率和优化前频率的干扰改善增益,对增益较大的给出优化建议“建议更换XXXX小区的BCCH频点为XXX”,并指出问题:“B小区被A小区同频干扰”。如果路损值不满足判定条件,则执行(6)判断;
(5)检查目标小区的同站小区向该目标小区的切入成功率,如果切入成功率均大于90%,给出建议为:“建议检查是否存在同步时钟失锁告警(198087386),更换CMB(Common resource Backplane,公共资源框背板)板”。如果同站间小区切入成功率不满足条件,则执行(6)判定;
(6)通过调用掉话分析中无线环境分析算法,若判断为切换前弱覆盖的比例超过40%,则同时检查切换前测量报告中邻区对象:
如果唯一,则给出建议:“该区域弱覆盖,建议加站或减小天线下倾角”;
如果不唯一,且其余对象的频点+色码均不在A小区的无线参数邻区表中配置,则输出信号最强的对象,建议可增加其为潜在邻区,此时的问题是“邻区漏配”,给出建议:“A可尝试增加XXX为邻区”;
如果判断为上行干扰比例超过40%,则指出问题“所处区域上行干扰较大”,并给出建议“检查切换原侧小区是否存在直放站或外部干扰”;
如果判断为下行+上下行干扰比例超过40%,则对切换原侧的载频进行频率分析,TCH(Traffic Channel,业务信道)载频如果为跳频,则指出对应小区TCH的跳频更换序列建议,并给出建议“切换原侧载频可能存在干扰,建议尝试更换频点XXX”。
以上三条件均不满足则执行(7)的判定。
(7)检查切换失败的切换前的语音版本信息和切换后的语音版本信息(即源测和目标侧语音版本信息),
如果一致,则执行(8);
如果不一致,则检查切换后的语音版本信息,(如果目标侧语音版本未上报,则把源测版本信息作为目标侧语音版本);
如果100%为AMR(Adaptive Multi-Rate Codec,自适应多速率编解码)语音版本:AFS(Adaptive full rate coding,自适应全速率编码)或者AHS(Adaptive half rate coding,自适应半速率编码),即没有EFR(Enhanced full rate,增强型全速率),FR(Full Rate,全速率),HR(Half Rate,半速率),则观察是否IMSI(International Mobile Subscriber Identification Number,国际移动用户识别码)和IMEI(International Mobile Equipment Identity,移动设备国际身份码)为未知,如果有IMEI上报,则指出“XXXX,XXXX以下IMEI终端支持AMR可能存在缺陷”;
如果IMEI为空,存在IMSI,则指出问题“XXXX,XXXX以下IMSI用户使用的终端支持AMR/HR可能存在缺陷”;
如果均为空,则指出问题“用户支持AMR存在缺陷,请开启common ID获取IMSI信息”;
如果100%是HR语音版本,指出问题:“终端支持HR有问题”;
如果不满足全为AMR语音版本,则执行(8)的判定;
(8)观察切换失败对象,观察全部话单中的IMEI或者IMSI是否相同,(即A->B切换失败10次,存在于3个话单中,看这3次通话对应的IMEI或者IMSI是否相同),判断准则如下:
如果有IMEI,如果为同一个IMEI则直接指出问题“该IMEI终端类型存在缺陷”;
如果无IMEI信息上报,则检查IMSI,如果为同一个IMSI则指出问题“该用户终端可能存在问题”。
二、乒乓切换优化分析是对切换异常事件中乒乓切换次数较多的小区进 行优化分析。
按照乒乓切换是否发生在同频段间执行不同的判定,如果发生在同频段间,即900-900小区间切换或者1800-1800小区间切换。
(1)计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,(如果切换后高于切换前,记为差值=0)如果波动小于等于第一预设电平值,如3db:
A)下行电平紧急切换次数占乒乓切换次数之和比超过预设下行电平紧急切换比例(如40%),且切换前下行平均质量小于等于预设切换前下行平均质量(如1.5),则计算该小区切换前的平均下行电平值为N1,并给出建议:“用户所处区域弱覆盖,建议调整挽救性电平切换门限为N1+2db”,如果不满足质量要求即不满足切换前下行平均质量小于等于预设切换前下行平均质量,则指出问题为:“弱覆盖”。若不满足40%门限要求,即不满足下行电平紧急切换次数占乒乓切换次数之和比超过预设下行电平紧急切换比例的要求,则执行下一条判定;
B)如果上行电平挽救性切换次数占乒乓切换次数之和比超过预设上行电平挽救性切换比例(如40%),且切换前上下行平均电平链路差(每条测量报告计算链路差,考虑功控影响)大于等于预设切换前上下行平均电平链路值(如15db),则给出建议:“该小区链路不均衡,建议排查馈线口连接”,如果不满足切换前上下行平均电平链路差大于等于15db,则计算切换前平均上行质量,如果小于等于预设切换前上行平均质量(如1.5),则计算该小区切换前的平均下行电平值为N1,并给出建议为:“建议调整挽救性上行电平切换门限为N1+2db”。若不满足40%要求,即不满足上行电平挽救性切换次数占乒乓切换次数之和比超过预设上行电平挽救性切换比例的要求,则执行下一条判定;
C)如果下行质量挽救性切换次数占乒乓切换次数之和比超过预设下行质量挽救性切换比例(如40%),则对于该小区的载频进行频率分析,给出频率优化建议为“该载频存在较大干扰,建议更换频点为XXX”。若不满足40%要求,即不满足下行质量挽救性切换次数占乒乓切换次数之和比超过预设下行质量挽救性切换比例的要求,则执行下一条判定;
D)如果上行质量挽救性切换次数占乒乓切换次数之和比超过预设上行质量挽救性切换比例(如40%),计算切换前下行平均质量,如果切换前下行平均质量小于预设切换前下行平均质量(如1.5),检查乒乓切换发生的IMSI,如果存在多个国际移动用户识别码(IMSI)或所有IMSI为未知,则给出建议“该区域可能存在上行干扰,或小区直放站存在隐性故障建议排查”,如果IMSI唯一且非未知,则指出“该XXXX IMSI用户终端可能存在问题”;若不满足上行质量挽救性切换次数占乒乓切换次数之和比超过预设上行质量挽救性切换比例的要求,则执行下一条判定;
E)如果PBGT(Power Budget,功率预算)切换次数占乒乓切换次数之和比超过预设功率预算切换比例(如40%),计算每次切换前主小区(切换前的小区称之为主小区)和切换目标小区在邻区中的电平值之间的差值,则得到平均值N2,并给出建议:“所处区域为无主覆盖,建议修改切换小区间的PBGT门限参数值为N2+2DB”;
以上5个判定(A-E)若均不满足时,即执行A-E五个判定之后,如果仍无法分析出问题原因,可执行以下判定:
(2)计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,(如果切换后高于切换前,记差值为0),如果波动大于等于第二预设电平值(如4db),则检查该小区其他同站小区是否存在切换前后电平差平均波动大于等于第二预设电平值(如4db)的现象,如果有,则指出问题为:“该小区存在鸳鸯馈线问题,疑似与X小区”;如果没有,则检查同小区的其他载频是否有此现象,如果没有,则给出建议:“该载频存在发射功率不稳的隐性故障,建议排查”,如果有则给出建议:“该小区的馈线接口松动,需要排查”;
在以上判定条件均不满足的情况下则不给出优化建议。
按照乒乓切换是否发生在异频段间执行不同的判定,如果发生在异频段间,即900-1800小区间切换或者1800-900小区间切换:
(1)计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差(如果切换后高于切换前,记差值为0),如果波动小于等于第一预设电平值,如3db,进行以下判定:
A)下行电平紧急切换次数占乒乓切换次数之和比超过预设下行电平紧急切换比例(如40%),且切换前下行平均质量小于等于预设切换前下行平均质量(如1.5),则计算该小区切换前的平均下行电平值N1,并给出建议:“用户所处区域弱覆盖,建议调整挽救性电平切换门限为N1+2db”,如果不满足质量要求,即不满足下行质量挽救性切换次数占乒乓切换次数之和比超过预设下行质量挽救性切换比例,则指出问题为“弱覆盖”。若不满足40%要求,即不满足下行电平紧急切换次数占乒乓切换次数之和比超过预设下行电平紧急切换比例的要求,则执行下一条判定;
B)如果上行电平挽救性切换次数占乒乓切换次数之和比超过预设上行电平挽救性切换比例(如40%),且切换前上下行平均电平链路差(每条测量报告计算链路差,考虑功控的影响)大于等于预设切换前上下行平均电平链路值(如15db),则给出建议:“该小区链路不均衡,建议排查馈线口连接”,如果不满足切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值(如15db),则计算切换前平均上行质量,如果小于等于预设切换前上行平均质量(如1.5),则计算该小区切换前的平均下行电平值N1,并给出建议为:“建议调整挽救性上行电平切换门限为N1+2db”。若不满足40%要求,即不满足上行电平挽救性切换次数占乒乓切换次数之和比超过预设上行电平挽救性切换比例的要求,则执行下一条判定;
C)如果下行质量挽救性切换次数占乒乓切换次数之和比超过预设下行质量挽救性切换比例(如40%),则对于该小区的载频进行频率分析,并给出频率优化建议“该载频存在较大干扰,建议更换频点为XXX”。不满足40%要求,即不满足下行质量挽救性切换次数占乒乓切换次数之和比超过预设下行质量挽救性切换比例的要求,则执行下一条判定;
D)如果上行质量挽救性切换次数占乒乓切换次数之和比超过预设上行质量挽救性切换比例(如40%),计算切换前下行平均质量,如果切换前下行平均质量小于预设切换前下行平均质量(如1.5),检查乒乓切换发生IMSI,如果存在多个IMSI或所有IMSI为未知,则给出建议:“该区域可能存在上行干扰,或小区直放站存在隐性故障建议排查”,如果IMSI唯一且非未知,则指出问题:“该XXXX IMSI用户终端可能存在问题”;如果不满足上行 质量挽救性切换次数占乒乓切换次数之和比超过预设上行质量挽救性切换比例,则执行以下判定:
E)如果切换原小区是900小区对某1800小区的乒乓切换中宏微切换占乒乓切换次数之和比超过预设宏微切换比例(如40%),检查对于900小区来说是否“标准PBGT切换适用的层次(PbgtHoLayer)”(简称层次)设置成第一层次预设值(如11),其乒乓切换的邻接1800小区的层次是否设置为第二层次预设值(如3),如果不是则给出建议:“参数设置有误,请将PbgtHoLayer设置成11,相邻小区层次设置为3”。如果是,则检查1800反向切回900小区的切换原因,如果下行质量切换比例(下行质量引起的切换占兵乓切换的比例)超过预设的下行质量切换比例(如40%),则对切换的目标载频进行频率优化分析,并给出建议:“1800载频存在较强干扰,建议频点更换为XXX”,如果下行电平挽救性切换比例(下行电平挽救性引起的切换占兵乓切换的比例,即下行电平挽救性切换次数占乒乓切换次数之和比)超过预设下行电平挽救性切换比例(如40%),则自动进入(2)判定。如果上行电平切换比例(即上行电平引起的切换占兵乓切换的比例)超过预设上行电平切换比例(如40%),则给出建议:“目标载频链路不均衡严重,建议检查上行链路连接”;
F)如果切换原小区是900小区对某1800小区的乒乓切换中PBGT切换占乒乓切换次数之和比(简称PBGT比例)超过预设PBGT切换比例(如40%),检查1800反向切回900小区的切换原因,如果PBGT比例超过40%,则记录1800切换至900的平均切换前1800小区在邻区的电平和900小区的服务小区的电平差,得到平均值N2,并给出建议:“1800-900反向PBGT切换门限设置过小,建议修改切换小区间的PBGT门限参数值为N2+2DB”。如果下行质量切换比例超过预设的下行质量切换比例(如40%),则对切换的目标载频进行频率优化分析,并给出建议“1800载频存在较强干扰,建议频点更换为XXX”,如果下行电平挽救性切换比例超过预设下行电平挽救性切换比例(如40%)则自动进入(2)判定。如果上行电平切换比例超过预设上行电平切换比例(如40%),则建议:“目标载频链路不均衡严重,建议检查上行链路连接”;
当以上A-F判定均不满足时,即执行A-F六个判定之后,如果仍无法分析出问题原因,则执行以下判定:
(2)计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,(如果切换后高于切换前,记差值为0),如果波动大于等于4db,则检查该小区其他同站小区是否存在切换前后电平差平均波动大于等于4db现象,如果有,则建议:“该小区存在鸳鸯馈线问题,疑似与X小区”;如果没有,则检查同小区的其他载频是否有此现象,如果没有则建议:“该载频存在发射功率不稳的隐性故障,建议排查”,如果有,则建议:“该小区的馈线接口松动,需要排查”。
三、频繁切换一般原因同乒乓切换,唯一区别是刨除天线接反的相关判定(即乒乓切换中的(2)判定条件),通过切换异常事件筛选出频繁切换次数较多的小区列表,对于满足条件的小区进行优化分析。由于算法类同与乒乓切换判定的条件(1),这里就不再赘述。
下面以中国某市2012年10月27日全天的数据为示例来说明本发明实施例的内容:
通过对中国某市2012年10月27日全天的数据进行分析。首先对CDT数据中的BSC内切换数据进行汇总分析获取切换失败次数、切换成功率、切换掉话次数、连续切换失败次数、频繁切换次数、乒乓切换话单数等信息,发现以29-1-1为切换目标小区的切换异常数比较多,然后设置切换分析的参数值,对29-1-1为切换目标小区的各小区对分别进行优化分析,从而得出以下分析结果:29-274-3小区切换到29-1-1发生了频繁切换,分析出来的问题是“无主覆盖”,给出的建议是“修改29-274-3和29-1-1小区对间的PBGT为10db”,29-1-2小区切换到29-1-1发生了乒乓切换,分析出来的问题是“无主覆盖”,给出的建议是“修改29-1-2和29-1-1小区对间的PBGT为10db”,29-144-3小区切换到29-1-1发生了频繁切换,分析出来的问题是“弱覆盖”,给出的建议是“修改29-144-3的下行切换门限为-84db”,同时对于发生弱覆盖的29-144-3小区可以在地图上进行定位关联分析。
本发明实施例以CDT和MRCI数据为基础,结合工程数据和无线数据, 从切换失败、乒乓切换和频繁切换等多个维度进行关联分析,给出网络优化指导的意见及建议,并能将切换失败的位置在地图上进行定位,以辅助网络优化工程师快速查找问题,提高了用户体验,并节省了大量的时间。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相光硬件完成,上述程序可以存储于计算机可读存储介质中,如只读存储器、磁盘或光盘等。可选地,上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地,上述实施例中的各模块/单元可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。本发明实施例不限制于任何特定形式的硬件和软件的结合。
工业实用性
本发明实施例在从切换异常事件出发,以CDT和MRCI数据为基础,结合工程数据和无线数据,从切换失败、乒乓切换和频繁切换等多个维度进行关联分析,给出网络优化指导的意见及建议,并能将切换失败的位置在地图上进行定位,以辅助网络优化工程师快速查找问题,提高了用户体验,并节省了大量的时间。

Claims (19)

  1. 一种全球移动通信系统GSM网络切换异常的优化方法,包括以下步骤:
    通过对CDT数据进行分析,筛选出切换异常的异常小区;
    根据MRCI数据,对所获得的切换异常的异常小区的切换异常原因进行分析,得到切换异常原因及解决切换异常的优化建议;
    其中,所述切换异常包括从当前小区切换到目标小区的切换失败、乒乓切换以及频繁切换;
    其中,所述CDT数据是呼叫详细跟踪数据,所述MRCI数据是载波干涉测量报告数据。
  2. 根据权利要求1所述的方法,所述方法还包括:
    通过工程数据和地理信息系统对所筛选出的异常小区的地理位置进行定位。
  3. 根据权利要求1或2所述的方法,其中,所述切换异常为从当前小区切换到目标小区的切换失败,所述筛选出切换异常的异常小区包括:
    通过对向同一目标小区发生切换失败的时间进行记录,得到相邻的发生切换失败的多个第一时间间隔;
    在所述多个第一时间间隔中筛选出连续的第一时间间隔小于等于预设的第一时间间隔的多个第一时间间隔集合;
    对每个第一时间间隔集合中的第一时间间隔的个数进行统计,当所统计的个数超过第一预设门限值时,将所述第一时间间隔集合中向同一目标小区发生切换的异常小区作为切换失败的异常小区;
    其中,所述第一时间间隔是指向同一目标小区发生切换时,相邻两次切换失败的时间差。
  4. 根据权利要求1或2所述的方法,其中,所述切换异常为从当前小区切换到目标小区的乒乓切换,所述筛选出切换异常的异常小区包括:
    通过对当前小区和目标小区发生切换成功的时间进行记录,得到相邻的 发生切换成功的多个第二时间间隔;
    在所述多个第二时间间隔中筛选出第二时间间隔小于等于预设的第二时间间隔的第二时间间隔集合;
    对所述第二时间间隔集合中的第二时间间隔的个数进行统计,当所统计的个数超过第二预设门限值时,将目标小区作为乒乓切换的异常小区;
    其中,所述第二时间间隔是指当前小区与目标小区之间发生切换时,相邻两次切换成功的时间差。
  5. 根据权利要求1或2所述的方法,其中,所述切换异常为从当前小区切换到目标小区的频繁切换,所述筛选出切换异常的异常小区包括:
    通过对不少于三个小区中发生切换成功的时间进行记录,得到相邻的发生切换成功的多个第三时间间隔;
    在所述多个第三时间间隔中筛选出第三时间间隔小于等于预设的第三时间间隔的第三时间间隔集合;
    对所述第三时间间隔集合中第三时间间隔的个数进行统计,当所统计的个数超过第三预设门限值时,将所述发生切换的不少于三个小区作为频繁切换的异常小区;
    其中,所述第三时间间隔是指不少于三个小区之间发生切换时,相邻两次切换成功的时间差。
  6. 根据权利要求1或2所述的方法,所述切换异常为从当前小区切换到目标小区的乒乓切换或频繁切换,所述根据MRCI数据,对所获得的切换异常的异常小区的切换异常原因进行分析,得到切换异常原因及解决切换异常的优化建议,包括:
    所述切换异常发生在同频段间,计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动小于等于第一预设电平值,进行以下判定:
    判断下行电平紧急切换次数占异常切换次数之和比如果超过预设下行电平紧急切换比例,且切换前下行平均质量小于等于预设切换前下行平均质量,则给出优化建议:用户所处区域弱覆盖,建议调整挽救性电平切换门限,如 果不满足切换前下行平均质量小于等于预设切换前下行平均质量,则指出问题为:弱覆盖,如果下行电平紧急切换次数占异常切换次数之和比没有超过预设下行电平紧急切换比例,则执行以下判定:
    判断上行电平挽救性切换次数占异常切换次数之和比如果超过预设上行电平挽救性切换比例,且切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则给出优化建议:该小区链路不均衡,建议排查馈线口连接;如果不满足切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则计算切换前平均上行质量,如果小于等于预设切换前上行平均质量,则给出优化建议:建议调整挽救性上行电平切换门限;如果不满足上行电平挽救性切换次数占异常切换次数之和比超过预设上行电平挽救性切换比例,则执行以下判定:
    判断下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则对于该小区的载频进行频率分析,给出优化建议:该载频存在较大干扰,建议更换频点;如果不满足下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则执行以下判定:
    判断上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,计算切换前下行平均质量,如果切换前下行平均质量小于预设切换前下行平均质量,检查异常切换发生的国际移动用户识别码IMSI,如果存在多个IMSI或所有IMSI为未知,则给出优化建议:该区域可能存在上行干扰,或小区直放站存在隐性故障建议排查,如果IMSI唯一且非未知,则指出问题为:该IMSI用户终端可能存在问题;如果不满足上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,则执行以下判定:
    判断功率预算PBGT切换次数占异常切换次数之和比超过预设功率预算切换比例,给出优化建议:所处区域为无主覆盖,建议修改小区间的PBGT门限参数值。
  7. 根据权利要求6所述的方法,所述切换异常为从当前小区切换到目标小区的乒乓切换,如果还没有得到切换异常原因及解决切换异常的优化建议,所述方法还包括:
    计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动大于等于第二预设电平值,检查该小区其他同站小区是否存在切换前后电平差平均波动大于等于所述第二预设电平值的现象,如果有,则指出问题为:该小区存在鸳鸯馈线问题;如果没有,则检查同小区的其他载频是否有此现象,如果没有,则给出优化建议:该载频存在发射功率不稳的隐性故障,建议排查,如果有,则给出优化建议:该小区的馈线接口松动,需要排查。
  8. 根据权利要求1或2所述的方法,所述切换异常为从当前小区切换到目标小区的乒乓切换或频繁切换,所述根据MRCI数据,对所获得的切换异常的异常小区的切换异常原因进行分析,得到切换异常原因及解决切换异常的优化建议,包括:
    所述切换异常发生在异频段间,计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动小于等于第一预设电平值,进行以下判定:
    判断下行电平紧急切换次数占异常切换次数之和比超过预设下行电平紧急切换比例,且切换前下行平均质量小于等于预设切换前下行平均质量,则给出优化建议:用户所处区域弱覆盖,建议调整挽救性电平切换门限,如果不满足切换前下行平均质量小于等于预设切换前下行平均质量,则指出问题为“弱覆盖”,若不满足下行电平紧急切换次数占异常切换次数之和比超过预设下行电平紧急切换比例,则执行以下判定:
    判断上行电平挽救性切换次数占异常切换次数之和比如果超过预设上行电平挽救性切换比例,且切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则给出优化建议:该小区链路不均衡,建议排查馈线口连接;如果不满足切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则计算切换前平均上行质量,如果小于等于预设切换前上行平均质量,则给出优化建议:建议调整挽救性上行电平切换门限;如果不满足上行电平挽救性切换次数占异常切换次数之和比超过预设上行电平挽救性切换比例,则执行以下判定:
    判断下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量 挽救性切换比例,则对于该小区的载频进行频率分析,给出优化建议:该载频存在较大干扰,建议更换频点;如果不满足下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则执行以下判定:
    判断上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,计算切换前下行平均质量,如果切换前下行平均质量小于预设切换前下行平均质量,检查异常切换发生的国际移动用户识别码IMSI,如果存在多个IMSI或所有IMSI为未知,则给出优化建议:该区域可能存在上行干扰,或小区直放站存在隐性故障建议排查,如果IMSI唯一且非未知,则指出问题为:该IMSI用户终端可能存在问题;如果不满足上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,则执行以下判定:
    判断如果当前小区对目标小区的异常切换中宏微切换占异常切换次数之和比超过预设宏微切换比例,检查当前小区的标准PBGT切换适用的层次是否设置为第一层次预设值,目标小区的标准PBGT切换适用的层次是否设置为第二层次预设值,如果不是,则给出优化建议:参数设置有误;如果是,则判断如果下行质量切换比例超过预设下行质量切换比例,则对目标小区载频进行频率优化分析,并给出优化建议:目标小区载频存在较强干扰,建议频点更换;判断如果上行电平切换比例超过预设上行电平切换比例,则给出优化建议:目标小区载频链路不均衡严重,建议检查上行链路连接;
    判断如果当前小区对目标小区的异常切换中PBGT切换占异常切换次数之和比超过预设PBGT切换比例,则给出优化建议:目标小区到当前小区反向PBGT切换门限设置过小;判断如果下行质量切换比例超过预设下行质量切换比例,则对目标小区载频进行频率优化分析,并给出优化建议:目标小区载频存在较强干扰,建议频点更换;判断如果上行电平切换比例超过预设上行电平切换比例,则给出优化建议:目标小区载频链路不均衡严重,建议检查上行链路连接;
    其中当前小区频段为900,目标小区频段为1800。
  9. 根据权利要求8所述的方法,所述切换异常为从当前小区切换到目标小区的乒乓切换,如果还没有得到切换异常原因及解决切换异常的优化建议, 所述方法还包括:
    计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动大于等于第二预设电平值,检查该小区其他同站小区是否存在切换前后电平差平均波动大于等于所述第二预设电平值的现象,如果有,则指出问题为:该小区存在鸳鸯馈线问题;如果没有,则检查同小区的其他载频是否有此现象,如果没有,则给出优化建议:该载频存在发射功率不稳的隐性故障,建议排查,如果有,则给出优化建议:该小区的馈线接口松动,需要排查。
  10. 一种GSM网络切换异常的优化装置,包括:
    筛选模块,设置为通过对CDT数据进行分析,筛选出切换异常的异常小区;以及
    优化模块,设置为根据MRCI数据,对所获得的切换异常的异常小区的切换异常原因进行分析,得到切换异常原因及解决切换异常的优化建议;
    其中,所述切换异常包括从当前小区切换到目标小区的切换失败、乒乓切换以及频繁切换;
    其中,所述CDT数据是呼叫详细跟踪数据,所述MRCI数据是载波干涉测量报告数据。
  11. 根据权利要求10所述的装置,所述装置还包括:
    定位单元,设置为通过工程数据和地理信息系统对所筛选出的异常小区的地理位置进行定位。
  12. 根据权利要求10或11所述的装置,所述筛选模块包括:
    获得第一时间间隔单元,设置为通过对向同一目标小区发生切换失败的时间进行记录,得到相邻的发生切换失败的多个第一时间间隔;
    筛选第一时间间隔集合单元,设置为在所述多个第一时间间隔中筛选出连续的第一时间间隔小于等于预设的第一时间间隔的多个第一时间间隔集合;以及
    确定切换失败单元,设置为对每个第一时间间隔集合中的第一时间间隔的个数进行统计,当所统计的个数超过第一预设门限值时,将所述第一时间 间隔集合中向同一目标小区发生切换的异常小区作为切换失败的异常小区;
    其中,所述第一时间间隔是指向同一目标小区发生切换时,相邻两次切换失败的时间差。
  13. 根据权利要求10或11所述的装置,所述筛选模块包括:
    获得第二时间间隔单元,设置为通过对当前小区和目标小区发生切换成功的时间进行记录,得到相邻的发生切换成功的多个第二时间间隔;
    筛选第二时间间隔集合单元,设置为在所述多个第二时间间隔中筛选出第二时间间隔小于等于预设的第二时间间隔的第二时间间隔集合;以及
    确定乒乓切换单元,设置为对所述第二时间间隔集合中的第二时间间隔的个数进行统计,当所统计的个数超过第二预设门限值时,将目标小区作为乒乓切换的异常小区;
    其中,所述第二时间间隔是指当前小区与目标小区之间发生切换时,相邻两次切换成功的时间差。
  14. 根据权利要求10或11所述的装置,所述筛选模块包括:
    获得第三时间间隔单元,设置为通过对不少于三个小区中发生切换成功的时间进行记录,得到相邻的发生切换成功的多个第三时间间隔;
    筛选第三时间间隔集合单元,设置为在所述多个第三时间间隔中筛选出第三时间间隔小于等于预设的第三时间间隔的第三时间间隔集合;以及
    确定频繁切换单元,设置为对所述第三时间间隔集合中第三时间间隔的个数进行统计,当所统计的个数超过第三预设门限值时,将所述发生切换的不少于三个小区作为频繁切换的异常小区;
    其中,所述第三时间间隔是指不少于三个小区之间发生切换时,相邻两次切换成功的时间差。
  15. 根据权利要求10或11所述的装置,所述切换异常为从当前小区切换到目标小区的乒乓切换或频繁切换,所述优化模块是设置为:判断所述切换异常发生在同频段间,计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动小于等于第一预设电平值,进行以下判定:
    判断下行电平紧急切换次数占异常切换次数之和比如果超过预设下行电平紧急切换比例,且切换前下行平均质量小于等于预设切换前下行平均质量,则给出优化建议:用户所处区域弱覆盖,建议调整挽救性电平切换门限,如果不满足切换前下行平均质量小于等于预设切换前下行平均质量,则指出问题为:弱覆盖,如果下行电平紧急切换次数占异常切换次数之和比没有超过预设下行电平紧急切换比例,则执行以下判定:
    判断上行电平挽救性切换次数占异常切换次数之和比如果超过预设上行电平挽救性切换比例,且切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则给出优化建议:该小区链路不均衡,建议排查馈线口连接;如果不满足切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则计算切换前平均上行质量,如果小于等于预设切换前上行平均质量,则给出优化建议:建议调整挽救性上行电平切换门限;如果不满足上行电平挽救性切换次数占异常切换次数之和比超过预设上行电平挽救性切换比例,则执行以下判定:
    判断下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则对于该小区的载频进行频率分析,给出优化建议:该载频存在较大干扰,建议更换频点;如果不满足下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则执行以下判定:
    判断上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,计算切换前下行平均质量,如果切换前下行平均质量小于预设切换前下行平均质量,检查异常切换发生的国际移动用户识别码IMSI,如果存在多个IMSI或所有IMSI为未知,则给出优化建议:该区域可能存在上行干扰,或小区直放站存在隐性故障建议排查,如果IMSI唯一且非未知,则指出问题为:该IMSI用户终端可能存在问题;如果不满足上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,则执行以下判定:
    判断功率预算PBGT切换次数占异常切换次数之和比超过预设功率预算切换比例,给出优化建议:所处区域为无主覆盖,建议修改小区间的PBGT门限参数值。
  16. 根据权利要求15所述的装置,所述切换异常为从当前小区切换到目标小区的乒乓切换,所述优化模块还设置为:在还未得到切换异常原因及解决切换异常的优化建议时,执行以下判定:
    计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动大于等于第二预设电平值,检查该小区其他同站小区是否存在切换前后电平差平均波动大于等于所述第二预设电平值的现象,如果有,则指出问题为:该小区存在鸳鸯馈线问题;如果没有,则检查同小区的其他载频是否有此现象,如果没有,则给出优化建议:该载频存在发射功率不稳的隐性故障,建议排查,如果有,则给出优化建议:该小区的馈线接口松动,需要排查。
  17. 根据权利要求10或11所述的装置,所述切换异常为从当前小区切换到目标小区的乒乓切换或频繁切换,所述优化模块是设置为:判断所述切换异常发生在异频段间,计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动小于等于第一预设电平值,进行以下判定:
    判断下行电平紧急切换次数占异常切换次数之和比超过预设下行电平紧急切换比例,且切换前下行平均质量小于等于预设切换前下行平均质量,则给出优化建议:用户所处区域弱覆盖,建议调整挽救性电平切换门限,如果不满足切换前下行平均质量小于等于预设切换前下行平均质量,则指出问题为“弱覆盖”,若不满足下行电平紧急切换次数占异常切换次数之和比超过预设下行电平紧急切换比例,则执行以下判定:
    判断上行电平挽救性切换次数占异常切换次数之和比如果超过预设上行电平挽救性切换比例,且切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则给出优化建议:该小区链路不均衡,建议排查馈线口连接;如果不满足切换前上下行平均电平链路差大于等于预设切换前上下行平均电平链路值,则计算切换前平均上行质量,如果小于等于预设切换前上行平均质量,则给出优化建议:建议调整挽救性上行电平切换门限;如果不满足上行电平挽救性切换次数占异常切换次数之和比超过预设上行电平挽救性切换比例,则执行以下判定:
    判断下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则对于该小区的载频进行频率分析,给出优化建议:该载频存在较大干扰,建议更换频点;如果不满足下行质量挽救性切换次数占异常切换次数之和比超过预设下行质量挽救性切换比例,则执行以下判定:
    判断上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,计算切换前下行平均质量,如果切换前下行平均质量小于预设切换前下行平均质量,检查异常切换发生的国际移动用户识别码IMSI,如果存在多个IMSI或所有IMSI为未知,则给出优化建议:该区域可能存在上行干扰,或小区直放站存在隐性故障建议排查,如果IMSI唯一且非未知,则指出问题为:该IMSI用户终端可能存在问题;如果不满足上行质量挽救性切换次数占异常切换次数之和比超过预设上行质量挽救性切换比例,则执行以下判定:
    判断如果当前小区对目标小区的异常切换中宏微切换占异常切换次数之和比超过预设宏微切换比例,检查当前小区的标准PBGT切换适用的层次是否设置为第一层次预设值,目标小区的标准PBGT切换适用的层次是否设置为第二层次预设值,如果不是,则给出优化建议:参数设置有误;如果是,则判断如果下行质量切换比例超过预设下行质量切换比例,则对目标小区载频进行频率优化分析,并给出优化建议:目标小区载频存在较强干扰,建议频点更换;判断如果上行电平切换比例超过预设上行电平切换比例,则给出优化建议:目标小区载频链路不均衡严重,建议检查上行链路连接;
    判断如果当前小区对目标小区的异常切换中PBGT切换占异常切换次数之和比超过预设PBGT切换比例,则给出优化建议:目标小区到当前小区反向PBGT切换门限设置过小;判断如果下行质量切换比例超过预设下行质量切换比例,则对目标小区载频进行频率优化分析,并给出优化建议:目标小区载频存在较强干扰,建议频点更换;判断如果上行电平切换比例超过预设上行电平切换比例,则给出优化建议:目标小区载频链路不均衡严重,建议检查上行链路连接;
    其中当前小区频段为900,目标小区频段为1800。
  18. 根据权利要求17所述的装置,所述切换异常为从当前小区切换到目 标小区的乒乓切换,所述优化模块还设置为:在还未得到切换异常原因及解决切换异常的优化建议时,执行以下判定:
    计算切换目标载频切换前在邻区列表中的电平和切换后作为服务小区的平均电平差,如果波动大于等于第二预设电平值,检查该小区其他同站小区是否存在切换前后电平差平均波动大于等于所述第二预设电平值的现象,如果有,则指出问题为:该小区存在鸳鸯馈线问题;如果没有,则检查同小区的其他载频是否有此现象,如果没有,则给出优化建议:该载频存在发射功率不稳的隐性故障,建议排查,如果有,则给出优化建议:该小区的馈线接口松动,需要排查。
  19. 一种计算机可读存储介质,存储有程序指令,当该程序指令被执行时可实现权利要求1-9任一项所述的方法。
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