WO2016090841A1 - Dispositif et procédé de gestion de défaillance de commutation de réseau gsm - Google Patents

Dispositif et procédé de gestion de défaillance de commutation de réseau gsm Download PDF

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Publication number
WO2016090841A1
WO2016090841A1 PCT/CN2015/078585 CN2015078585W WO2016090841A1 WO 2016090841 A1 WO2016090841 A1 WO 2016090841A1 CN 2015078585 W CN2015078585 W CN 2015078585W WO 2016090841 A1 WO2016090841 A1 WO 2016090841A1
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WIPO (PCT)
Prior art keywords
handover
cell
information
reason
failure
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PCT/CN2015/078585
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English (en)
Chinese (zh)
Inventor
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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Publication of WO2016090841A1 publication Critical patent/WO2016090841A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Definitions

  • This document relates to the field of communications, and in particular, to a GSM network handover failure management method and apparatus.
  • 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 is the most direct manifestation of user perception. Improving the success rate of network handover 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.
  • Diagnostic analysis methods for the cause of traditional handover failures generally use the following reasons to infer and view the problem of handover failure, including: no handover problem, handover failure caused by hardware failure, and handover failure caused by unreasonable data configuration. .
  • the traditional methods of analysis are to investigate specific problems one by one from the common reasons, and cannot locate the problem comprehensively and quickly.
  • the embodiment of the invention provides a GSM network handover failure management method and device, which solves the problem that the failure reason of the GSM network handover failure in the related art is not timely and inaccurate.
  • the embodiment of the invention provides a GSM network handover failure management method, including:
  • the call detailed tracking data including handover information and bill record information
  • the carrier interferometry report data including neighboring area measurement information
  • the wireless data includes Wireless environment information
  • the CDR record information the carrier interference measurement report
  • the neighboring area measurement information in the data and the wireless environment information in the wireless data determine the reason for the handover failed cell.
  • the determining the handover failure cell includes:
  • the handover information includes continuous handover failure information; when consecutive handover to the same target cell fails, there is no handover to other cells in the middle; there is no target to the target
  • the target cell is a handover failure cell.
  • the determining the reason for the handover failed cell includes:
  • the reason for the handover failed cell is determined according to the bill record information in the call detailed tracking data.
  • the determining, by the handover information in the call detailed tracking data, the reason for the handover failed cell includes:
  • the determining, according to the handover failure number information, the analyzed cell pair includes:
  • the specified handover failed cell is analyzed, and is associated with the handover failure object distribution, and is sorted according to the number of handover failures;
  • a cell pair whose handover failure number is greater than the average number of handover failures per cell is selected as the analyzed cell pair.
  • the determining, by the handover success information, the reason for determining the handover failed cell by using the cell pair analysis comprises: determining whether the cell pair relationship is a co-site relationship, and if yes, the target cell is unchanged, and performing statistics The handover success rate of all the cells that are switched with the target cell, if at least one of the non-same cell handover success rates is greater than the first preset success rate, and the inter-station cell handover success rate is all less than the second preset success rate,
  • the reason for the handover failure is that there may be a clock abnormality; if it is not the same station relationship, the reason for the handover failed cell is determined according to the handover information in the call detailed tracking data and the neighboring area measurement information in the carrier interferometric report data;
  • Determining the reason for the handover failed cell according to the handover information in the call detail tracking data and the neighboring cell measurement information in the carrier interferometric report data including: counting the number of abnormal handover failures in all handover failure times, and determining that the abnormal handover fails Whether the ratio of the number of handover failures is greater than a preset abnormal handover failure ratio; if yes, determining whether the handover failure cell satisfies the maximum path loss value of the neighboring cell of the handover failure target cell that is less than twice the handover failure target cell, if yes, Performing broadcast control channel frequency optimization analysis on the cell with the broadcast control channel and the target cell separately from the target cell, comparing the optimized frequency of the two carrier frequencies with the interference improvement gain of the pre-optimization frequency, and determining the cause of the handover failure for the larger gain If the ratio is less than the preset abnormal handover failure ratio, the handover failure cell is determined according to the neighboring area measurement information in the carrier interference measurement report data and the wireless environment information in the wireless data. s
  • Determining the reason for the handover failed cell according to the neighboring area measurement information in the carrier interference measurement report data and the wireless environment information in the wireless data, including: if it is determined that the proportion of the weak coverage before the handover exceeds the preset weak coverage ratio, At the same time, the neighboring cell object in the measurement report before the handover is checked. If it is unique, the reason for the handover failure is: the area is weakly covered; if not, the frequency and color code of the remaining objects are not configured in the wireless parameter neighboring table of the cell.
  • the reason for the failure of the handover is that there is a neighboring area missed allocation; if it is determined that the uplink interference ratio exceeds the preset first interference ratio, the reason for the handover failure is: the uplink interference in the area is large; if it is determined as the downlink and uplink and downlink interference ratio If the second interference ratio is exceeded, the frequency of the carrier frequency on the original side is analyzed. If the carrier frequency of the service channel is frequency hopping, the handover fails. The reason is that: switching the original carrier frequency may have interference; if not, determining the reason for the handover failed cell according to the bill record information in the call detailed tracking data;
  • the bill record information includes language version information, a mobile device international identity code, and international mobile subscriber identity information; The voice version information before switching and the voice version information after switching; if not, check the voice version information after switching; if all are AMR voice versions: observe whether the international mobile subscriber identity and the mobile device international identity code are unknown If there is a mobile device international identity code report, the reason for the handover failure is: the terminal supporting AMR of a mobile device international identity code may be defective; if the mobile device international identity code is empty, there is an international mobile subscriber identity, the reason for the handover failure The terminal used by an international mobile subscriber ID user to support AMR/HR may be defective; if it is empty, the reason for the handover failure is: the user supports AMR defect; if all are HR voice versions, the reason for the handover failure is : Terminal support HR has a problem; if not satisfied If the AMR voice version and the voice version information
  • Determining the reason for the failure according to the mobile device international identity code or the international mobile subscriber identity code in all the bills including: observing the handover failure object, and observing whether the mobile device international identity code or the international mobile subscriber identity code in all the bills are the same. If there is a mobile device international identity code, if it is the same mobile device international identity code, the reason for the handover failure is that the mobile device international identity code terminal type is defective; if no mobile device international identity code information is reported, the international mobile user is checked. The identification code, if it is the same international mobile subscriber identity, the reason for the handover failure is that the user terminal may have a problem.
  • the method further includes: providing a corresponding suggestion according to the failure reason.
  • the method further includes: acquiring location information and engineering parameters of the handover failed cell, and positioning the handover failed cell to be determined by the engineering parameter. On the map.
  • An embodiment of the present invention further provides a GSM network handover failure management apparatus, including an acquisition module, Identify the module and reason module, where:
  • the acquiring module is configured to acquire call detailed tracking data, carrier interferometry report data, and wireless data of the cell, where the detailed call tracking data includes switching information and bill record information, where the carrier interferometry report data includes neighboring area measurement information.
  • the wireless data includes wireless environment information;
  • the determining module is configured to determine a handover failure cell according to the handover information in the call detailed tracking data
  • the reason module is configured to determine a reason for the handover failed cell according to the handover information in the call detailed tracking data, the bill record information, the neighbor cell measurement information in the carrier interferometry report data, and the radio environment information in the radio data.
  • the determining module is configured to:
  • the handover information includes continuous handover failure information; when consecutive handover to the same target cell fails, there is no handover to other cells in the middle; there is no presence to the target cell If the time interval between successful handovers and the handover failure is less than or equal to the preset time, the target cell is a handover failure cell.
  • the reason module is set to:
  • the reason for the handover failed cell is determined according to the bill record information in the call detailed tracking data.
  • the reason module determines, according to the handover information in the call detailed tracking data, the reason for the handover failed cell, including:
  • the reason module determines the analyzed cell pair according to the handover failure number information, including:
  • the specified handover failed cell is analyzed, and is associated with the handover failure object distribution, and is sorted according to the number of handover failures;
  • a cell pair whose handover failure number is greater than the average number of handover failures per cell is selected as the analyzed cell pair.
  • the reason module determines, according to the handover success information, the reason for determining the handover failed cell by using the cell pair, including: determining whether the cell pair relationship is a co-site relationship, and if yes, the target cell does not Change, calculate the handover success rate of all the cells that are switched with the target cell, if the handover success rate of the non-stationary cell is at least one greater than the first preset success rate, and the cell handover success rate of the same station is less than the second preset
  • the reason for the failure of the handover is that there may be a clock abnormality; if it is not the same station relationship, the reason for the handover failed cell is determined according to the handover information in the call detailed tracking data and the neighboring area measurement information in the carrier interferometric report data. ;
  • the reason module determines the cause of the handover failed cell according to the handover information in the call detail tracking data and the neighboring cell measurement information in the carrier interferometry report data, including: counting the number of abnormal handover failures in all handover failure times, and determining the abnormality Whether the ratio of the number of handover failures to the number of handover failures is greater than a preset abnormal handover failure ratio; if yes, determining whether the handover failure cell satisfies the maximum path loss value of the neighboring cell of the handover failure target cell that is less than twice the handover failure target cell, if Then, the broadcast control channel frequency optimization analysis is performed on the cell with the broadcast control channel and the target cell respectively, and the optimized frequency of the two carrier frequencies and the interference improvement gain of the pre-optimization frequency are compared, and the gain is determined to be switched.
  • the reason for the failure is: interference by the same frequency cell; if not satisfied and the abnormal handover ratio is less than the preset abnormal handover failure ratio, the handover is determined according to the neighboring area measurement information in the carrier interference measurement report data and the wireless environment information in the wireless data. The reason for the failed cell;
  • the reason module determines the reason for the handover failed cell according to the neighboring area measurement information in the carrier interference measurement report data and the wireless environment information in the wireless data, including: if it is determined that the proportion of the weak coverage before the handover exceeds the preset weak coverage ratio , at the same time, check the neighboring area object in the measurement report before the handover.
  • the reason for the handover failure is: the area is weakly covered; if not, and the frequency and color code of the remaining objects are not in the wireless parameter neighboring area table of the cell If the configuration is successful, the reason for the failure of the handover is that there is a neighboring area missed; if it is determined that the uplink interference ratio exceeds the preset first interference ratio, the reason for the handover failure is: the uplink interference in the area is large; if it is determined to be the downlink and uplink and downlink If the interference ratio exceeds the second interference ratio, the frequency of the carrier frequency of the original switching side is analyzed. If the carrier frequency of the traffic channel is frequency hopping, the reason for the handover failure is that there may be interference when switching the original carrier frequency; if not, then Determining the reason for the handover failed cell according to the bill record information in the call detailed tracking data;
  • the reason module determines the reason for the handover failed cell according to the CDR record information in the call detailed tracking data, including: the CDR record information includes language version information, a mobile device international identity code, and an international mobile subscriber identity information; Switching the failed voice version information and the switched voice version information; if not, checking the switched voice version information; if all are AMR voice versions: observing whether the international mobile subscriber identity and the mobile device international identity code For unknown, if there is a mobile device international identity code report, the reason for the handover failure is: the terminal supporting AMR of a mobile device international identity code may be defective; if the mobile device international identity code is empty, there is an international mobile subscriber identity, then the handover The reason for the failure is that the terminal used by an international mobile subscriber ID user to support AMR/HR may be defective; if it is empty, the reason for the handover failure is: the user supports AMR defect; if all are HR voice versions, the handover fails.
  • the CDR record information includes language version information, a mobile device international identity code
  • the reason is: the terminal supports HR has problems; If the voice version information before the handover and the voice version information after the handover are inconsistent, the reason for the failure is determined according to the mobile device international identity code or the international mobile subscriber identity code in all the bills;
  • the reason for determining the failure according to the mobile device international identity code or the international mobile subscriber identity code in all the bills includes: observing the handover failure object, and observing whether the mobile device international identity code or the international mobile subscriber identity code in all the bills is the same, if any If the mobile device international identity code is the same mobile device international identity code, the reason for the handover failure is that the mobile device international identity code terminal type is defective; if no mobile device international identity code information is reported, the international mobile subscriber identity is checked. If the same international mobile subscriber identity is used, the reason for the failure is that there may be a problem with the user terminal.
  • the device further includes a suggestion module, where the suggestion module is configured to, after the reason module determines the cause of the handover failure of the handover failed cell, and provide a corresponding suggestion according to the failure reason.
  • the suggestion module is configured to, after the reason module determines the cause of the handover failure of the handover failed cell, and provide a corresponding suggestion according to the failure reason.
  • the device further includes a positioning module, where the positioning module is configured to acquire location information and engineering parameters of the handover failed cell after the reason module determines a reason for the handover failure of the handover failed cell, The cell in which the handover failed is located on the map determined by the engineering parameters.
  • the positioning module is configured to acquire location information and engineering parameters of the handover failed cell after the reason module determines a reason for the handover failure of the handover failed cell, The cell in which the handover failed is located on the map determined by the engineering parameters.
  • An embodiment of the present invention provides a GSM network handover failure management method and system, where the GSM network handover failure management method includes: first acquiring cell detailed tracking data, carrier interferometry report data, and wireless data, and calling detailed tracking data includes switching. Information and bill record information, the carrier interferometry report data includes neighboring area measurement information, and the wireless data includes wireless environment information; then, the handover failed cell is determined according to the handover information in the call detailed tracking data; and finally, the handover information in the detailed tracking data according to the call is performed.
  • the bill record information, the neighbor cell measurement information in the carrier interferometry report data, and the radio environment information in the radio data determine the cause of the handover failed cell.
  • the joint analysis method of the detailed tracking data and the carrier interferometric report, and the step-by-step process analysis combined with the wireless data instead of using the relevant technology according to the experience value of the network engineer, determine and determine the specific data. Analysis can analyze the specific reasons of handover failure in detail, fast and accurate, and improve the efficiency of handling network handover failure.
  • FIG. 1 is a schematic flowchart of a GSM network handover failure management method according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic flowchart of a GSM network handover failure management method according to Embodiment 2 of the present invention
  • FIG. 3 is a schematic flowchart of a GSM network handover failure management method according to Embodiment 3 of the present invention.
  • FIG. 4 is a schematic diagram of a first structure of a GSM network handover failure management apparatus according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic diagram of a second structure of a GSM network handover failure management apparatus according to Embodiment 4 of the present invention.
  • FIG. 6 is a schematic diagram of a third structure of a GSM network handover failure management apparatus according to Embodiment 4 of the present invention.
  • CDT Chip Detail Trace
  • MRCI Measure Report Carrier Interference
  • the GSM network handover failure management method in this embodiment includes the following steps:
  • Step S101 acquiring call detailed tracking data, carrier interference measurement report data, and wireless data of the cell;
  • the call detailed tracking data includes switching information and bill record information
  • the carrier interferometry report data includes neighboring area measurement information
  • the wireless data includes wireless environment information
  • the cells in this step may be one or more.
  • Step S102 Determine, according to the handover information in the call detailed tracking data, a handover failure cell
  • Step S103 determining, according to the handover information, the bill record information, the neighbor cell measurement information in the carrier interferometry report data, and the radio environment information in the radio data, the reason for the handover failed cell;
  • the reason for the cell with the handover failure is analyzed in combination with the specific data information, instead of using the experience of the traditional network optimization engineer, the solution is single and the cycle is long, and the problem location is not accurate enough, so that it can be fast It is prepared to know the failure reason of the handover failure cell and improve the efficiency of network optimization.
  • determining, according to the handover information in the call detailed tracking data, the handover failure cell may include: acquiring handover information of the cell from the call detailed tracking data of the cell, where the handover information includes continuous handover failure information;
  • the target cell fails to switch continuously, and there is no handover to other cells (whether successful or failed); there is no successful handover to the target cell, and the time interval between handover failures is less than or equal to the preset time, then the target The cell is a handover failed cell.
  • the preset time here can be customized according to the situation, optional, set to 15 seconds.
  • the switching interval here refers to a time difference between two consecutive handover failure events, that is, a time interval between two adjacent handover failures is less than or equal to a preset time.
  • determining the reason for the handover failure cell according to the handover information, the CDR record information, the neighbor cell measurement information in the carrier interferometry report data, and the radio environment information in the radio data may include: Determining the reason for the handover failure cell according to the handover information in the call detailed tracking data; if the reason for the handover failure cell cannot be determined, determining the handover failure according to the handover information in the call detailed tracking data and the neighbor measurement information in the carrier interferometric report data The reason of the cell; if the reason for the handover failure cell cannot be determined, the reason for the handover failure cell is determined according to the neighbor cell measurement information in the carrier interferometry report data and the radio environment information in the radio data; if the reason for the handover failure cell cannot be determined, Then, the reason for switching the failed cell is determined according to the bill record information in the call detailed tracking data.
  • the reason for determining the handover failed cell according to the handover information in the detailed call tracking data includes: acquiring handover information of the cell from the detailed call tracking data of the cell, where the handover information includes the handover failure number information and the handover success rate information; The information determines the analyzed cell pair; and the cell pair analysis determines the reason for the handover failed cell according to the handover success rate information.
  • the determining, by the handover failure number information, the analyzed cell pair includes: analyzing the designated handover failure cell, correlating to the handover failure object distribution, sorting according to the number of handover failures; calculating the total handover failure number/switching source cell number of the cell, The average number of handover failures per cell is obtained; the cell pair whose handover failure number is greater than the average number of handover failures per cell is selected as the analyzed cell pair.
  • the handover success rate of a cell is lower than the threshold set by the user: determining that the cell relationship is the same station relationship, if yes, the target cell is unchanged, and all the handovers of the cell that is switched with the target cell are successfully determined. Rate, if at least one of the non-station cell handover success rates is greater than the first preset success rate, and the inter-cell cell handover success rate is all less than the second preset success rate; The reason for the failure is that there may be a clock abnormality; if it is not the same station cell, the reason for the handover failed cell is determined according to the cell carrier interference measurement report.
  • the determining, by the cell carrier interference measurement report, the reason for the handover failure cell includes: counting the number of abnormal handover failures in the number of all handover failures, and determining whether the proportion of the abnormal handover failure times is greater than the preset abnormal handover failure ratio; if yes, The cause of the failure is determined according to the path loss value; if not, the success rate of the cell of the target cell to the target cell is checked, and the reason for the failure is determined according to the success rate of the cell of the target cell to the target cell.
  • the reason for determining the failure according to the path loss value includes: determining whether the cell meets the maximum path loss value of the neighboring cell of the target cell with the path loss value less than twice the handover failure target cell, and if yes, camping on the cell with the control channel and the target cell
  • the target cell separately performs broadcast control channel frequency optimization analysis, compares the optimized frequency of the two carrier frequencies and the interference improvement gain of the pre-optimization frequency, and optimizes the gain to be determined to be interfered by the same-frequency cell; if not,
  • the reason for the failure is determined by calling the wireless parameter analysis algorithm in the call drop analysis.
  • the reason for determining the handover failure according to the handover success rate of the same cell of the target cell to the target cell includes: determining that the handover success rate is greater than a preset third success rate; if yes, there is a synchronization clock loss lock alarm; if not, then The cause of the failure is determined by calling a wireless parameter analysis algorithm in the call drop analysis.
  • the reason for determining the failure by calling the wireless parameter analysis algorithm in the call drop analysis includes: if it is determined that the proportion of the weak coverage before the handover exceeds the preset coverage ratio, the neighboring area object in the measurement report before the handover is also checked: if it is unique, the reason for the failure Yes: the area is weakly covered; if it is not unique, and the frequency and color code of the other objects are not configured in the wireless parameter neighbor list of the cell, the object with the strongest output signal is the reason for the failure: If it is determined that the uplink interference ratio exceeds the preset first interference ratio, the failure reason is: the uplink interference in the area is large; if it is determined that the downlink and downlink interference ratio exceeds the second interference ratio, the handover is performed on the original side. The frequency is analyzed. If the carrier frequency of the service channel is frequency hopping, the reason for the failure is that there may be interference when switching the original carrier frequency; if it is not satisfied, the failure reason is determined according to the voice version information.
  • the reason for determining the failure according to the voice version information includes: checking the voice version information before the handover failure and the voice version information after the handover; if they are consistent, according to the mobile device international identity code or the international mobile subscriber identity code in all the CDRs. Determine the cause of the failure; if they are inconsistent, then Check the voice version information after the switch; if all are AMR voice versions: observe whether the international mobile subscriber identity and the mobile device international identity code are unknown. If the mobile device international identity code is reported, the reason for the failure is the international identity of a mobile device.
  • the terminal of the code supports AMR may be defective; if the mobile device international identity code is empty and there is an international mobile subscriber identity, the reason for the failure is that the terminal used by an international mobile subscriber identity user to support AMR/HR may be defective; The reason for the failure is that the user equipment supports the AMR defect; if all the HR voice versions are available, the reason for the failure is that the terminal supports the HR problem; if the AMR voice version is not satisfied, it is based on all the CDRs.
  • the mobile device international identity code or the international mobile subscriber identity code determines the reason for the failure.
  • the reason for determining the handover failed cell according to the handover success information for the cell pair analysis includes: when the handover success rate of a cell pair is lower than a threshold set by the user: determining that the cell pair relationship is the same station relationship, and if yes, the target The cell is unchanged, and the handover success rate of all the cells that are switched with the target cell is counted.
  • the handover success rate of the non-stationary cell is at least one greater than the first preset success rate, and the cell handover success rate of the same station is less than the second Preset success rate; it is considered that there may be a clock abnormality; if it is not the same station cell, the reason for the handover failed cell is determined according to the handover information in the call detailed tracking data and the neighboring area measurement information in the carrier interferometric report data;
  • Determining the cause of the handover failure cell according to the handover information in the call detail tracking data and the neighboring cell measurement information in the carrier interferometric report data including: counting the number of abnormal handover failures in all handover failure times, and determining that the abnormal handover failure times account for the handover failure Whether the proportion of times is greater than a preset abnormal handover failure ratio; if yes, determining a failure cause according to the path loss value; if not, checking a handover success rate of the same cell of the target cell to the target cell, according to the same cell of the target cell Determining the failure cause to the target cell; determining the failure reason according to the path loss value includes: determining whether the cell meets the maximum path loss value of the neighboring cell of the target cell with the path loss value less than twice the handover failure target, if yes, then And the target cell with the broadcast control channel and the target cell respectively perform broadcast control channel frequency optimization analysis, compare the optimized frequency of the two carrier frequencies and the interference improvement gain of the pre-optimization frequency, and optimize the gain
  • Determining the reason for the handover failure cell according to the neighboring area measurement information in the carrier interference measurement report data and the wireless environment information in the wireless data includes: if it is determined that the proportion of the weak coverage before the handover exceeds the preset weak coverage ratio (eg, 40%), Simultaneously check the neighboring cell object in the measurement report before the handover: if it is unique, the reason for the failure is weak coverage of the region; if not, and the frequency and color code of the remaining objects are not configured in the wireless parameter neighboring table of the cell, then If the object with the strongest output signal is the source, the reason for the failure is that there is a neighboring area missed; if it is determined that the uplink interference ratio exceeds the preset first interference ratio, the failure reason is that the uplink interference is large in the area; if it is determined as the downlink and uplink and downlink interference If the ratio exceeds the second interference ratio, the frequency of the carrier frequency of the original switching side is analyzed. If the TCH carrier frequency is frequency hopping, the reason for the
  • the reason for determining the handover failed cell according to the CDR record information in the detailed call tracking data includes: the CDR record information includes language version information, the mobile device international identity code, and the international mobile subscriber identity information; and the voice version information before the handover is checked. And the voice version information after the handover; if they are consistent, the failure reason is determined according to the mobile device international identity code or the international mobile subscriber identity code in all the CDRs; if not, the switched voice version information is checked; if all are AMR voices Version: Observe whether the international mobile subscriber identity and the mobile device international identity code are unknown.
  • the reason for the failure is that the terminal supporting AMR of a mobile device international identity code may be defective; if the mobile device international If the identity code is empty and there is an international mobile subscriber identity, the reason for the failure is that the terminal used by an international mobile subscriber identity user supports AMR/HR. If it is empty, the reason for the failure is that the user supports AMR. Defects; if all are HR Sound version, the reason for the failure is: The terminal supports HR have a problem; if not whole as AMR voice version, the reason for the failure to determine the identity of all international bill of the mobile device code or international mobile subscriber identity;
  • the reasons for failure according to the mobile device international identity code or the international mobile subscriber identity code in all the bills include: observing the handover failure object, observing whether the mobile device international identity code or the international mobile subscriber identity code in all the bills is the same, if there is movement Device international identity code, if the same The mobile device international identity code fails because the mobile device international identity code terminal type is defective; if no mobile device international identity code information is reported, the international mobile subscriber identity is checked, if it is the same international mobile subscriber identity The reason for the failure is that there may be a problem with the user terminal.
  • the method further includes: providing a corresponding recommendation according to the failure reason. This can facilitate the network engineer to know how to solve the problem of handover failure in the cell, and directly deal with the problematic cell according to the corresponding proposal, thereby improving work efficiency.
  • the method further includes: acquiring the location information and the engineering parameter of the handover failure cell, and positioning the cell that fails the handover. Go to the map determined by the engineering parameters. In this way, the network engineer can quickly find the cell in question and deal with the problems that occur in the cell.
  • the GSM network handover failure management method in this embodiment includes the following steps:
  • Step S201 data import and preprocessing
  • the system needs to import CDT data, MRCI data, industrial data and wireless data to be analyzed, and pre-process and analyze the information such as frequency points and interferences, so as to prepare for detailed troubleshooting.
  • Step S202 object screening
  • the intra-BSC handover data in the CDT bill is used as an analysis starting point, and a cell with a low handover success rate or a large number of handover failures is selected as an analysis processing target. It is worth noting that in this step, the cell that fails to be handed over is determined first, and then the cell pair to be analyzed is selected from the cells that fail to be handed over.
  • Step S203 detailed analysis of the reason for the failure of the handover
  • Step S204 location of the problem cell
  • the geographic information according to the problem cell can be located on the map determined by the engineering parameters, where the problem cell refers to the cell where the handover failure has occurred.
  • the GSM network handover failure management method of the present embodiment is configured to obtain a cell list with a low handover success rate or a large number of handover failures for the BSC intra-switch data in the CDT, and count the cell handover success rate, the number of handover failures, Indicators such as the number of consecutive handover failures and the number of failed handovers.
  • the total number of consecutive handover failures of the same pair of cells in a bill is the sum of multiple segments.
  • a detailed analysis of the cause of the handover failure is to analyze the cell pairs satisfying the handover failure threshold and the handover success threshold.
  • Step S301 analyzing the designated handover failure cell, correlating to the handover failure object distribution, sorting according to the number of handover failures, first calculating the total handover failure number of the cell/the number of handover source cells, obtaining the average number of handover failures per cell, and then filtering The cell pair whose handover failure times is greater than the average number of handover failures per cell is selected.
  • 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, step S302 is performed, and if not, step S303 is performed.
  • Step S302 Check the success rate of all the handover pairs of the target cell (that is, count the handover success rate of all the cells that are switched with the target cell), and the target cell does not change. If there is more than 95% of the success rate of the handover success rate except the inter-cell relationship, the success rate of the inter-station handover is less than 90% (ie, if the handover success rate between non-station cells is at least one greater than 95%, and the same If the success rate of inter-station cell handover is less than 90%, the analysis suggestion is “There may be a clock abnormality. It is recommended to replace the CC board”. If the condition is not satisfied, the determination in step S303 is performed.
  • Step S303 Counting the information of each handover failure for the currently analyzed cell failure phenomenon, and the level of the target cell as the neighboring cell before the handover is greater than the detection of the uplink level by the peer base station in the handover ho detect message. 25 db or more is recorded as an exception. If the ho detect message of the peer base station is not detected, it is directly recorded as an exception. (That is, the average value of the neighboring cell level in the last four measurement reports before each switching is subtracted from the HoReserve value of each switching in the switching table in the BSC. If the difference is greater than 25 db, an abnormality is considered, if the HoReserve value is null, It is also considered to be an abnormality, and each switching is calculated as follows. If the number of abnormal switching failures exceeds 80% of the number of switching failures, the determination in step S304 is performed, and if the condition is not satisfied, the determination in step S305 is performed.
  • Step S304 Calculate the path loss method of the A to B cell according to the path loss algorithm:
  • the BCCH is the same as the target cell
  • the cell A and the target cell B respectively perform BCCH frequency optimization analysis, compare the optimized frequency of the two carrier frequencies and the interference improvement gain of the pre-optimization frequency, and give an optimization suggestion for the larger gain. "Recommended to replace the BCCH frequency of the XXXX cell. The point is XXX" and points out the problem: "B cell is interfered by the A cell with the same frequency.” If the path loss value does not satisfy the determination condition, the determination in step S306 is performed.
  • Step S305 Check the success rate of the same cell of the target cell to the target cell. If the success rate of the handover is greater than 90%, the recommendation is: "It is recommended to check whether there is a synchronous clock loss alarm (198087386), replace the CMB board. ". If the inter-station cell handover success rate does not satisfy the condition, step S306 is performed.
  • Step S306 By calling the wireless environment analysis algorithm in the call drop analysis,
  • 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 advice: "A can try to increase XXX as a neighbor.”
  • the uplink interference ratio exceeds 40%, it indicates that the problem "the uplink interference in the area is large", and gives a suggestion "check whether there is a repeater or external interference in the original cell.”
  • the frequency analysis of the carrier frequency of the switching original side is performed, and if the TCH carrier frequency is frequency hopping, the frequency hopping replacement sequence suggestion of the corresponding cell TCH is indicated, and a suggestion is given. There may be interference in switching the original carrier frequency. It is recommended to try to change the frequency point XXX".
  • step S307 is performed.
  • Step S307 Check the voice version information before the handover failure and the voice version information after the handover (ie, the source measurement and the target side voice version information),
  • step S308 is performed.
  • AMR voice version AFS or AHS, that is, there is no EFR, FR, HR, then observe whether the IMSI and IMEI are unknown. If there is an IMEI report, it indicates "XXXX, XXXX". The following IMEI terminals support AMR may have defects,"
  • step S308 is performed.
  • Step S308 Observe the handover failure object, and observe whether the IMEI or the IMSI in all the CDRs are the same, that is, the A->B handover fails 10 times, exists in 3 CDRs, and sees whether the IMEI or IMSI corresponding to the three calls is The same), the criteria are as follows:
  • the IMSI is checked, and if it is the same IMSI, the problem "The user terminal may have a problem" is indicated.
  • the case of combining the above steps is: through the analysis of the data of the whole city of China on October 27, 2012.
  • 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, and the number of consecutive handover failures. It is found that the number of handover anomalies of the handover target cell is 29-1-1. More, then set the parameter value of the handover analysis, and optimize the analysis of the cell pair of the handover target cell for 29-1-1, and obtain the following analysis result: 29-274-2 cell handover to 29-1-1 occurs
  • the switch fails.
  • the suggestion is "Recommended to check if there is a synchronous clock loss lock alarm (198087386), replace the CMB board.”
  • This embodiment provides a GSM network handover failure management apparatus, as shown in FIG. 4, including an acquisition module, a determination module, and a cause module, where:
  • the acquiring module is configured to acquire call detailed tracking data, carrier interferometry report data, and wireless data of the cell, and the detailed call tracking data includes switching information and bill record information, and the carrier interferometry report data includes neighboring area measurement information, and wireless data. Including wireless environment information;
  • the determining module is configured to determine a handover failure cell according to the handover information in the call detailed tracking data
  • the reason module is configured to determine a reason for switching the failed cell according to the handover information in the call detailed tracking data, the bill record information, the neighbor cell measurement information in the carrier interferometry report data, and the radio environment information in the radio data.
  • the determining module is configured to: obtain handover information of the cell from the detailed call tracking data of the cell, where the handover information includes continuous handover failure information; when the handover to the same target cell fails, there is no handover to other cells in the middle; If there is a successful handover to the target cell, and the time interval between the handover failures is less than or equal to the preset time, the target cell is a handover failure cell.
  • the reason module is set to: first determine the reason for the handover failure cell according to the handover information in the call detailed tracking data; if the reason for the handover failure cell cannot be determined, the handover information and the carrier interference measurement report data according to the call detailed tracking data
  • the neighboring area measurement information determines the reason for the handover failed cell; if the reason for the handover failed cell cannot be determined, the reason for the handover failed cell is determined according to the neighboring area measurement information in the carrier interference measurement report data and the wireless environment information in the wireless data; If the reason for switching the failed cell cannot be determined, the reason for switching the failed cell is determined according to the bill record information in the call detailed tracking data.
  • the reason module determines the reason for the handover failed cell according to the handover information in the call detailed tracking data, and includes: acquiring handover information of the cell from the detailed call tracking data of the cell, where the handover information includes the handover failure number information and the handover success rate information. Determining the analyzed cell pair according to the handover failure number information; determining the reason for the handover failure cell according to the handover success information for the cell pair analysis.
  • the reason module determines the analyzed cell pair according to the information about the number of handover failures, including: analyzing the designated handover failure cell, correlating to the handover failure object distribution, sorting according to the number of handover failures; and calculating the total handover failure number of the cell/ The number of source cells is switched, and the average number of handover failures per cell is obtained; and the cell pair whose number of handover failures is greater than the average number of handover failures per cell is selected as the analyzed cell pair.
  • the cause module determines, according to the handover success information, the reason for the handover failure cell, including: when the handover success rate of a cell pair is lower than a threshold set by the user: determining the small The pair relationship is the same station relationship. If yes, the target cell is unchanged, and the handover success rate of all the cells that are switched with the target cell is counted.
  • the handover success rate between the non-station cells is at least one greater than the first preset success rate
  • the inter-station cell handover success rate is all less than the second preset success rate; it is considered that there may be a clock abnormality; if it is not the same station cell, the handover information in the detailed tracking data of the call and the neighbor in the carrier interferometry report data are The area measurement information determines the reason for switching the failed cell;
  • the reason module determines, according to the handover information in the call detailed tracking data and the neighboring area measurement information in the carrier interferometric report data, the reason for the handover failure cell, including: counting the number of abnormal handover failures in all the handover failure times, and determining that the abnormal handover fails.
  • the ratio of the number of handover failures is greater than the preset abnormal handover failure ratio; if yes, the failure cause is determined according to the path loss value; if not, the handover success rate of the same cell of the target cell to the target cell is checked, according to the target cell
  • the reason for the failure of the handover success rate of the same-station cell to the target cell is determined; the reason for determining the failure according to the path loss value includes: if the cell meets the path loss value less than twice the maximum path loss value of the neighboring cell of the handover failure target cell, if satisfied, Then, the broadcast control channel frequency optimization analysis is performed on the cell with the broadcast control channel and the target cell respectively, and the optimized frequency of the two carrier frequencies and the interference improvement gain of the pre-optimization frequency are compared, and the gain is optimized.
  • the neighboring area measurement information in the carrier interference measurement report data and the wireless environment information in the wireless data determine the reason for the handover failed cell; determining the failure reason according to the handover success rate of the same cell of the target cell to the target cell includes: determining the success rate of the handover Both are greater than the preset second success rate. If yes, there is a synchronous clock loss of lock alarm; if not, the cause of the handover failed cell is determined according to the neighboring area measurement information in the carrier interference measurement report data and the wireless environment information in the wireless data;
  • the reason module determines, according to the neighboring area measurement information in the carrier interference measurement report data and the wireless environment information in the wireless data, the reason for the handover failed cell, including: if it is determined that the proportion of the weak coverage before the handover exceeds 40%, the handover is simultaneously checked.
  • the neighboring area object in the pre-measurement report : if it is unique, the area is weakly covered; if it is not unique, and the frequency and color code of the remaining objects are not configured in the wireless parameter neighboring area table of the cell, the object with the strongest output signal is output.
  • the reason for the failure is that the uplink interference is larger in the region; if it is determined that the downlink and uplink interference ratio exceeds the second interference ratio, then Switching the carrier frequency of the original side for frequency analysis, if the TCH carrier frequency is frequency hopping, the reason for the failure is that there may be interference when switching the original carrier frequency; If not, the reason for switching the failed cell is determined according to the bill record information in the detailed tracking data of the call;
  • the reason module determines, according to the bill record information in the call detailed tracking data, the reason for the handover failure cell, including: the bill record information includes language version information, a mobile device international identity code, and an international mobile subscriber identity information; and the handover failure check is performed.
  • the previous voice version information and the switched voice version information if they are consistent, the failure reason is determined according to the mobile device international identity code or the international mobile subscriber identity code in all the bills; if not, the switched voice version information is checked; If all are AMR voice versions: Observe whether the international mobile subscriber identity and the mobile device international identity code are unknown. If there is a mobile device international identity code report, the reason for the failure is that the terminal supporting AMR of a mobile device international identity code may be defective.
  • the reason for the failure is that the terminal used by an international mobile subscriber identity user may have a defect in supporting AMR/HR; if it is empty, the reason for the failure is : User support AMR is defective If all are HR voice versions, the reason for the failure is that the terminal supports the HR problem; if the AMR voice version is not satisfied, the failure reason is determined according to the mobile device international identity code or the international mobile subscriber identity code in all the CDRs;
  • the reasons for the failure of the mobile device international identity code or the international mobile subscriber identity in all the bills include: observing the handover failure object, observing whether the mobile device international identity code or the international mobile subscriber identity in all the bills is the same, if there is a mobile device If the international identity code is the same mobile device international identity code, the reason for the failure is that the mobile device international identity code terminal type is defective; if no mobile device international identity code information is reported, the international mobile subscriber identity is checked, if The same international mobile subscriber
  • the present embodiment provides a GSM network handover failure management apparatus. As shown in FIG. 5, the method further includes a suggestion module.
  • the suggestion module is configured to provide a corresponding suggestion according to the failure reason after the cause module determines the failure cause of the handover failed cell.
  • the GSM network handover failure management apparatus is provided in this embodiment.
  • the locating module is further configured to: after the cause module determines the failure cause of the handover failure cell, obtain the location information of the handover failure cell and The engineering parameter locates the cell that failed the handover to the map determined by the engineering parameters.
  • the above program may be stored in a computer readable storage medium such as a read only memory, a magnetic disk or an optical disk.
  • a computer readable storage medium such as a read only memory, a magnetic disk or an optical disk.
  • all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits.
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.
  • the embodiment of the invention analyzes the joint tracking data and the carrier interferometry report joint analysis method, and combines the wireless data to perform step-by-step process analysis, and uses specific data analysis to analyze the specific reasons of the handover failure in detail, quickly and accurately, and improve the processing.
  • the efficiency of network switch failure is the efficiency of network switch failure.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un système et un procédé de gestion de défaillance de commutation de réseau GSM, le procédé comprenant les étapes consistant : à obtenir des données de suivi de détail d'appel cellulaire, des données de rapport et de mesure d'interférence de porteuse et des données sans fil, les données de suivi de détail d'appel comprenant des informations de commutation et des informations d'enregistrement de facture d'appel, les données de rapport de mesure d'interférences de porteuse comprenant des informations de mesure de cellules adjacentes, les données sans fil comprenant des informations d'environnement sans fil; à déterminer une cellule de défaillance de commutation selon les informations de commutation dans les données de suivi de détail d'appel; à déterminer une raison de la cellule de défaillance de commutation selon les informations de commutation et les informations d'enregistrement de facture d'appel dans les données de suivi de détail d'appel, les informations de mesure de cellules adjacentes dans les données de rapport de mesure d'interférence de porteuse, et les informations d'environnement sans fil dans les données sans fil.
PCT/CN2015/078585 2014-12-09 2015-05-08 Dispositif et procédé de gestion de défaillance de commutation de réseau gsm WO2016090841A1 (fr)

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