CN105992251B - Switching band optimization method and device - Google Patents
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Abstract
The invention discloses a switching zone optimization method, wherein, the method detects the abnormal switching condition of the adjacent area relation in each direction according to the signaling soft acquisition data, and adjusts the measurement parameters of the adjacent area relation to be optimized according to the detection result; the invention also discloses a switching band optimization device.
Description
Technical Field
The present invention relates to wireless communication technologies, and in particular, to a handover band optimization method and apparatus.
background
handover is an important component of mobility management of a Long Term Evolution (LTE) system, and handover success rate is an important index of mobility management performance of the LTE system.
The configuration of an LTE cell handover parameter is a key factor in deciding the successful handover of a User Equipment (UE) from the cell to a neighboring cell. Handover parameter optimization is always the key point and difficulty of mobile communication network optimization.
Currently, the optimization of the handover parameters is mainly performed by collecting drive test data and Measurement Report (MR) data of the existing network, and obtaining suggested configuration values of the handover parameters through manual analysis. Because the number of the cells in the current network is huge, the suggested configuration values of the switching parameters are the same for all the adjacent cells of one cell by adopting a manual analysis method, the optimal configuration values of the switching parameters are difficult to be provided for each adjacent cell, and the optimal configuration values cannot be achieved.
at present, the optimization of the handover parameters cannot be performed exclusively for a specific neighboring cell, and the parameter setting method has the following disadvantages:
(1) The configuration of the handover parameters of all the neighboring cells of a cell is basically the same, and handover optimization for a specific neighboring cell direction cannot be realized.
(2) The switching parameters are set only based on drive test data and measurement reports, the data volume is insufficient, and the data has one-sidedness, so that the detailed coverage and switching relation between the source cell and each neighboring cell cannot be comprehensively reflected.
(3) When the switching is in problem, the problem can not be positioned quickly and accurately, and the execution efficiency of optimization work is not high.
Disclosure of Invention
In order to solve the existing technical problems, the invention mainly provides a switching band optimization method and a switching band optimization device.
The technical scheme of the invention is realized as follows:
the invention provides a switching band optimization method, which comprises the following steps:
detecting the abnormal switching condition of the adjacent cell relation in each direction according to the signaling soft acquisition data;
And adjusting the measurement parameters of the adjacent cell relation to be optimized according to the detection result.
in the foregoing solution, the detecting of the abnormal handover situation of the neighboring cell relation in each direction according to the signaling soft mining data includes:
And according to Radio Resource Control (RRC) connection reestablishment process information of a UU interface in signaling soft acquisition External Data Representation (XDR) Data and X2 switching process information of an X2 interface, carrying out switching abnormal condition detection on the adjacent relation in each direction.
in the foregoing solution, the detecting of the abnormal switching condition of the neighboring relationship in each direction according to the RRC connection reestablishment procedure information of the UU interface in the signaling soft mining XDR data and the X2 switching procedure information of the X2 interface includes:
Extracting all X2 switching flow records from the X2AP data and storing the records into a database;
Extracting all RRC connection reconstruction process records in the same time period from UU interface data, scanning scenes of each RRC connection reconstruction event one by one, and judging whether the RRC connection reconstruction events are caused by switching abnormal conditions and types of the switching abnormal conditions by combining corresponding X2 switching process records in a database.
in the foregoing solution, the adjusting the measurement parameter of the neighboring cell relation to be optimized according to the detection result includes: and adjusting parameters influencing the inter-cell switching behavior in the adjacent cell relation to be optimized according to the detected type of the abnormal switching condition of each adjacent cell relation and the severity of the abnormal switching condition.
in the above scheme, the method further comprises: and performing ping-pong handover detection on the adjacent cell relation in each direction according to the signaling soft acquisition data, and adjusting the measurement parameters of the adjacent cell relation subjected to ping-pong handover according to the detection result of the ping-pong handover.
In the foregoing solution, the performing ping-pong handover detection on the neighboring cell relation in each direction according to the signaling soft mining data includes:
Obtaining a first time after UE switching in a first adjacent area relation according to X2 switching flow records in signaling soft mining XDR data, searching an X2 switching record of the UE which executes switching in a second adjacent area relation last time before the first time, wherein the direction of the second adjacent area relation is opposite to that of the first adjacent area relation, if the second adjacent area relation is searched, calculating a difference value between the first time and a second time when the UE starts switching in the searched X2 switching record, judging whether the difference value is smaller than a second threshold, if the difference value is smaller than the second threshold, determining that the switching of the UE in the first adjacent area relation is ping-pong switching, and if the difference value is not searched or larger than the second threshold, determining that the switching of the UE in the first adjacent area relation is non-ping-pong switching.
The invention provides a switching band optimizing device, comprising: the device comprises a first detection module and an adjustment module; wherein,
The first detection module is used for detecting the abnormal switching condition of the adjacent cell relation in each direction according to the signaling soft acquisition data and transmitting the detection result to the adjustment module;
and the adjusting module is used for adjusting the measurement parameters of the adjacent cell relation to be optimized according to the detection result.
In the foregoing solution, the first detection module is specifically configured to perform switching anomaly detection on the neighboring relationship in each direction according to RRC connection reestablishment procedure information of a UU interface in signaling soft acquisition XDR data and X2 switching procedure information of an X2 interface.
in the above scheme, the first detection module is specifically configured to extract all X2 switching flow records from X2AP data, and store the records in a database;
extracting all RRC connection reconstruction process records in the same time period from UU interface data, scanning scenes of each RRC connection reconstruction event one by one, and judging whether the RRC connection reconstruction events are caused by switching abnormal conditions and types of the switching abnormal conditions by combining corresponding X2 switching process records in a database.
in the foregoing solution, the adjusting module is specifically configured to adjust a parameter that affects inter-cell handover behavior in the neighboring cell relation to be optimized according to the type of the detected handover abnormal situation of each neighboring cell relation and the severity of the handover abnormal situation.
in the above scheme, the apparatus further comprises: the second detection module is used for performing ping-pong switching detection on the adjacent cell relation in each direction according to the signaling soft acquisition data and transmitting a detection result to the adjustment module;
Correspondingly, the adjusting module is further configured to adjust the measurement parameter of the neighboring cell relation where the ping-pong handover occurs according to the detection result of the ping-pong handover.
in the foregoing solution, the second detection module is specifically configured to obtain a first time after the UE is switched in the first neighboring cell relationship according to an X2 switching flow record in signaling soft sensing XDR data, search, in a database, an X2 switching record of the UE that performs switching in the second neighboring cell relationship last time before the first time, where the second neighboring cell relationship is opposite to the first neighboring cell relationship in direction, if the second time is found, calculate a difference between the first time and a second time at which the UE starts switching in the found X2 switching record, determine whether the difference is smaller than a second threshold, if the difference is smaller than the second threshold, determine that the current switching of the UE in the first neighboring cell relationship is ping-pong switching, and if the difference is not found or larger than the second threshold, determine that the current switching of the UE in the first neighboring cell relationship is non-ping-pong switching.
the invention provides a switching zone optimization method and a device, wherein the abnormal switching condition of the adjacent Cell Relation (Cell Relation) in each direction is detected according to signaling soft acquisition data, and the measurement parameter adjustment is carried out on the adjacent Cell Relation to be optimized according to the detection result; therefore, the switching problem existing in the network can be automatically, timely and accurately found, a refined switching parameter optimization scheme aiming at the specific adjacent cell relation can be rapidly provided, the efficiency of switching optimization work is greatly improved, and manpower and material resources can be saved. According to the existing network optimization experience, the processing speed of manual analysis is about 200 cells/person/day, the processing speed of the method is 16000 cells/hour, and the efficiency is improved by about 640 times.
drawings
Fig. 1 is a schematic flow chart of a handover optimization method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a process of detecting a handover exception according to an embodiment of the present invention;
Fig. 3 is a schematic flow chart of detecting ping-pong handover according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a switching band optimization apparatus according to an embodiment of the present invention.
Detailed Description
In the embodiment of the invention, the abnormal switching condition of the adjacent cell relation in each direction is detected according to the signaling soft acquisition data, and the measurement parameter of the adjacent cell relation to be optimized is adjusted according to the detection result.
the invention is further described in detail below with reference to the figures and the specific embodiments.
The embodiment of the invention realizes a switching band optimization method, as shown in fig. 1, the method comprises the following steps:
step 101: detecting the abnormal switching condition of the adjacent cell relation in each direction according to the signaling soft acquisition data;
Specifically, the abnormal switching condition detection is performed on the adjacent relation in each direction according to Radio Resource Control (RRC) connection reestablishment flow information of a UU interface in signaling soft mining XDR data and X2 switching flow information of an X2 interface, where the abnormal switching condition detection includes: and detecting whether the switching is too early, too late and wrong, wherein the adjacent cell relation is as follows: assuming that cells (Cell) a and Cell B are neighboring cells, the Cell a to Cell B direction is a neighboring Cell relation, and the Cell B to Cell a direction is another neighboring Cell relation.
The XDR data refers to the detailed records of the signaling and the service generated for the retention of the log of the Internet and the application of the signaling monitoring class after the XDR data is processed based on the full data.
The detecting of the abnormal switching condition of the adjacent relation in each direction according to the RRC connection reestablishment process information of the UU interface in the signaling soft mining XDR data and the X2 switching process information of the X2 interface comprises the following steps:
Extracting all X2 switching flow records from the X2AP data and storing the records into a database;
Extracting all RRC connection reconstruction process records in the same time period as the X2 switching process records from the UU interface data, scanning the scene of each RRC connection reconstruction event one by one, and judging whether the RRC connection reconstruction events are caused by switching abnormal conditions and the type of the switching abnormal conditions by combining the corresponding X2 switching process records in the database.
as shown in fig. 2, taking an RRC connection reestablishment message of the UE received by Cell a in an RRC connection reestablishment flow record as an example, determining whether the RRC connection reestablishment message is sent during handover of the UE according to a timestamp of the RRC connection reestablishment message;
if the RRC connection reestablishment message is sent during the UE switching, judging whether the Cell A is a switching source Cell according to an X2 switching flow record corresponding to the RRC connection reestablishment message, and if the Cell A is the switching source Cell, considering that the RRC connection reestablishment is initiated in the source Cell in the UE switching process (a switching preparation stage or a switching execution stage) and is a condition that the switching is too early; if the Cell A is not the source Cell of the handover, judging whether the Cell A is the target Cell of the handover according to the X2 handover flow record corresponding to the RRC connection reestablishment message, and if the Cell A is the target Cell of the handover, considering that the RRC connection reestablishment is initiated in the target Cell in the UE handover process (handover preparation phase), which is the condition of too late handover; if the Cell A is not the target Cell for switching, the RRC connection reestablishment is initiated in a third Cell except the source Cell and the target Cell in the UE switching process, and the situation is that the Cell is switched to the wrong Cell;
if the RRC connection reestablishment message is not sent during the UE handover, determining whether the time from the re-establishment of RRC connection (re-establishment) operation to the last UE handover is less than a first threshold according to an X2 handover flow record corresponding to the RRC connection reestablishment message, where the first threshold is a preset value, and may be determined as a suitable value according to an experiment, and if the time is less than the first threshold, determining whether Cell a is a source Cell of the handover according to an X2 handover flow record corresponding to the RRC connection reestablishment message, and if Cell a is a source Cell of the handover, determining that an air interface connection Failure (RLF, Radio Link Failure) occurs in CellB in a target Cell in a short time after the UE handover is successful, and then initiating RRC connection reestablishment in the source Cell a, which is a condition that the handover is too early; if the Cell A is not the source Cell of the handover, judging whether the Cell A is the target Cell of the handover according to the X2 handover flow record corresponding to the RRC connection reestablishment message, and if the Cell A is the target Cell of the handover, considering that the coverage problem causes RRC connection reestablishment to be initiated in the target Cell Cel A in a short time after the UE handover, and performing normal RRC connection reestablishment operation; if the Cell A is not the target Cell for switching, the RLF is considered to occur after the UE is switched, and RRC connection reestablishment is initiated in a third Cell except the source Cell and the target Cell, so that the situation that the Cell A is switched to the wrong Cell is achieved;
if the Cell is larger than the first threshold, searching a Cell B in which the UE is located before initiating RRC connection reestablishment, and judging whether the Cell A and the Cell B are the same Cell (A.
step 102: adjusting the measurement parameters of the adjacent cell relation to be optimized according to the detection result;
Specifically, parameters affecting inter-cell switching behaviors in the neighbor cell relations to be optimized are adjusted according to the detected types of the switching abnormal conditions of the neighbor cell relations and the severity of the switching abnormal conditions; the types of the abnormal handover situations can be premature handover, late handover and handover to a wrong cell, and the severity of the abnormal handover situations can be counted the occurrence times of the abnormal handover situations in a set time period, wherein the more the times, the higher the severity; the parameter affecting the inter-cell handover behavior may be a cell offset parameter (CIO), the neighbor relation to be optimized may be a set adjustment threshold, and when the severity of the handover abnormality of the neighbor relation reaches the threshold, the neighbor relation is the neighbor relation to be optimized.
The method further comprises the following steps: performing ping-pong switching detection on the adjacent cell relation in each direction according to the signaling soft acquisition data, and adjusting the measurement parameters of the adjacent cell relation in which the ping-pong switching occurs according to the detection result of the ping-pong switching;
Specifically, a first time after switching of the UE in the first neighboring cell relation is obtained according to an X2 switching flow record in signaling soft sensing XDR data, an X2 switching record that the UE performs switching in a second neighboring cell relation last time before the first time is searched in a database, the direction of the second neighboring cell relation is opposite to that of the first neighboring cell relation, if the second neighboring cell relation is searched, a difference between the first time and a second time when the UE starts switching in the searched X2 switching record is calculated, whether the difference is smaller than a second threshold is judged, if the difference is smaller than the second threshold, the switching of the UE in the first neighboring cell relation is determined to be ping-pong switching, and if the difference is not searched or larger than the second threshold, the switching of the UE in the first neighboring cell relation is determined to be non-ping-pong switching. Here, the second threshold is a predetermined value, and a suitable value may be determined by experiment.
The measurement parameter adjustment for the neighboring cell relation with ping-pong handover may be to count the number of ping-pong handover occurring in each neighboring cell relation, and preferentially adjust the CIO of the neighboring cell relation with the largest number of ping-pong handover occurring.
as shown in fig. 3, all X2 switching flow records are extracted from X2AP data, taking an X2 switching flow record that UE switches from Cell a to Cell B as an example, obtaining time that UE switches from Cell a to Cell B as t according to the X2 switching flow record, searching for an X2 switching flow record that UE switches from Cell B to Cell a last time before time t, if found, calculating a difference between the time t and time that UE starts switching in the searched X2 switching flow record, determining whether the difference is smaller than a second threshold, if smaller than the second threshold, determining that the UE switches from Cell a to Cell B as ping-pong switching, otherwise, all are non-ping-pong switching.
The method can be executed by a server or a client installed on a PC.
in order to implement the above method, the present invention further provides a handover band optimization apparatus, as shown in fig. 4, the apparatus including: a first detection module 41 and an adjustment module 42; wherein,
The first detection module 41 is configured to perform switching anomaly detection on the neighboring cell relation in each direction according to the signaling soft mining data, and transmit a detection result to the adjustment module 42;
an adjusting module 42, configured to adjust a measurement parameter of the neighboring cell relation to be optimized according to the detection result;
the first detecting module 41 performs switching abnormal condition detection on the neighboring relation in each direction according to Radio Resource Control (RRC) connection reestablishment flow information of a UU interface in signaling soft mining XDR data and X2 switching flow information of an X2 interface, where the performing of the switching abnormal condition detection includes: detection of too early a handover, too late a handover and a handover to the wrong cell is performed.
The detecting of the abnormal switching condition of the adjacent relation in each direction according to the Radio Resource Control (RRC) connection reestablishment process information of the UU interface in the signaling soft mining XDR data and the X2 switching process information of the X2 interface comprises the following steps:
Extracting all X2 switching flow records from the X2AP data and storing the records into a database;
extracting all RRC connection reconstruction process records in the same time period from UU interface data, scanning scenes of each RRC connection reconstruction event one by one, and judging whether the RRC connection reconstruction events are caused by switching abnormal conditions and types of the switching abnormal conditions by combining corresponding X2 switching process records in a database.
The adjusting module 42 is specifically configured to adjust parameters affecting inter-cell handover behaviors in the neighboring cell relationships to be optimized according to the detected types of the handover abnormal conditions of the neighboring cell relationships and the severity of the handover abnormal conditions; the types of the abnormal handover situations can be premature handover, late handover and handover to a wrong cell, and the severity of the abnormal handover situations can be counted the occurrence times of the abnormal handover situations in a set time period, wherein the more the times, the higher the severity; the parameter affecting the inter-cell handover behavior may be CIO, the neighbor relation to be optimized may be a set adjustment threshold, and when the severity of the handover abnormality of the neighbor relation reaches the threshold, the neighbor relation is the neighbor relation to be optimized.
The device also includes: a second detecting module 43, configured to perform ping-pong handover detection on the neighboring cell relation in each direction according to the signaling soft mining data, and transmit a detection result to the adjusting module 42;
Correspondingly, the adjusting module 42 adjusts the measurement parameters of the neighboring cell relation where the ping-pong handover occurs according to the detection result of the ping-pong handover;
specifically, the second detecting module 43 obtains a first time after the UE is switched in the first neighboring cell relationship according to the record of the X2 switching flow in the signaling soft sensing XDR data, and searches the database for an X2 switching record in which the UE performs switching in the second neighboring cell relationship last time before the first time, where the second neighboring cell relationship is opposite to the first neighboring cell relationship in direction, if found, calculates a difference between the first time and a second time at which the UE starts switching in the found X2 switching record, determines whether the difference is smaller than a second threshold, if smaller than the second threshold, determines that the UE is switched in the first neighboring cell relationship at this time, and if not found or larger than the second threshold, determines that the UE is switched in the first neighboring cell relationship as a non-ping-pong switching at this time.
in practical applications, the functions of the first detecting module 41, the adjusting module 42 and the second detecting module 43 can be implemented by a Central Processing Unit (CPU) or a Micro Processing Unit (MPU) or a Digital Signal Processor (DSP) or a programmable gate array (FPGA) located in the device.
In conclusion, according to the signaling soft acquisition data, the switching abnormity and the ping-pong switching are detected and optimized, so that the accuracy and pertinence of the switching optimization are greatly improved, the switching abnormity and the ping-pong switching can be remarkably reduced, and the switching success rate is improved.
the above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A method for handover band optimization, the method comprising:
Detecting the abnormal switching condition of the adjacent cell relation in each direction according to the signaling soft acquisition data, wherein if the starting point and the end point are exchanged between the adjacent cells, the direction is changed to form different adjacent cell relations;
adjusting the measurement parameters of the adjacent cell relation to be optimized according to the detection result;
The detecting of the abnormal switching condition of the adjacent cell relation in each direction according to the signaling soft data comprises the following steps:
And detecting the abnormal switching condition of the adjacent relation in each direction according to Radio Resource Control (RRC) connection reestablishment process information of a UU interface in signaling soft acquisition external data representation (XDR) data and X2 switching process information of an X2 interface.
2. The method of claim 1, wherein the detecting the abnormal handover situation according to the RRC connection reestablishment procedure information of the UU interface and the X2 handover procedure information of the X2 interface in the signaling soft mining XDR data comprises:
extracting all X2 switching flow records from the X2AP data and storing the records into a database;
Extracting all RRC connection reconstruction process records in the same time period from UU interface data, scanning scenes of each RRC connection reconstruction event one by one, and judging whether the RRC connection reconstruction events are caused by switching abnormal conditions and types of the switching abnormal conditions by combining corresponding X2 switching process records in a database.
3. The method according to claim 2, wherein the adjusting the measurement parameters of the neighbor relation to be optimized according to the detection result comprises: and adjusting parameters influencing the inter-cell switching behavior in the adjacent cell relation to be optimized according to the detected type of the abnormal switching condition of each adjacent cell relation and the severity of the abnormal switching condition.
4. the method of claim 1, further comprising: and performing ping-pong handover detection on the adjacent cell relation in each direction according to the signaling soft acquisition data, and adjusting the measurement parameters of the adjacent cell relation subjected to ping-pong handover according to the detection result of the ping-pong handover.
5. the method of claim 4, wherein the detecting ping-pong handover of the neighbor relation in each direction according to the signaling soft data comprises:
Obtaining a first time after UE switching in a first adjacent area relation according to X2 switching flow records in signaling soft mining XDR data, searching an X2 switching record of the UE which executes switching in a second adjacent area relation last time before the first time, wherein the direction of the second adjacent area relation is opposite to that of the first adjacent area relation, if the second adjacent area relation is searched, calculating a difference value between the first time and a second time when the UE starts switching in the searched X2 switching record, judging whether the difference value is smaller than a second threshold, if the difference value is smaller than the second threshold, determining that the switching of the UE in the first adjacent area relation is ping-pong switching, and if the difference value is not searched or larger than the second threshold, determining that the switching of the UE in the first adjacent area relation is non-ping-pong switching.
6. a handover band optimization apparatus, comprising: the device comprises a first detection module and an adjustment module; wherein,
the first detection module is used for detecting the abnormal switching condition of the adjacent cell relation in each direction according to the signaling soft acquisition data and transmitting the detection result to the adjustment module, wherein if the starting point and the end point are exchanged between the adjacent cells, the direction is changed to form different adjacent cell relations;
the adjusting module is used for adjusting the measurement parameters of the adjacent cell relation to be optimized according to the detection result;
The first detection module is specifically configured to detect a switching abnormal condition of the neighboring relationship in each direction according to RRC connection reestablishment flow information of a UU interface in signaling soft acquisition XDR data and X2 switching flow information of an X2 interface.
7. the apparatus of claim 6, wherein the first detecting module is specifically configured to extract all X2 handover procedure records from X2AP data and store the records in a database;
Extracting all RRC connection reconstruction process records in the same time period from UU interface data, scanning scenes of each RRC connection reconstruction event one by one, and judging whether the RRC connection reconstruction events are caused by switching abnormal conditions and types of the switching abnormal conditions by combining corresponding X2 switching process records in a database.
8. The apparatus according to claim 7, wherein the adjusting module is specifically configured to adjust a parameter that affects inter-cell handover behavior in the neighboring cell relation that needs to be optimized according to the detected type of the handover abnormal situation and the severity of the handover abnormal situation of each neighboring cell relation.
9. The apparatus of claim 6, further comprising: the second detection module is used for performing ping-pong switching detection on the adjacent cell relation in each direction according to the signaling soft acquisition data and transmitting a detection result to the adjustment module;
correspondingly, the adjusting module is further configured to adjust the measurement parameter of the neighboring cell relation where the ping-pong handover occurs according to the detection result of the ping-pong handover.
10. The apparatus according to claim 9, wherein the second detecting module is specifically configured to obtain a first time after the UE is handed over in the first neighboring cell relation according to an X2 handover procedure record in signaling soft mining XDR data, and searching a database for an X2 handover record of the last time that the UE performed handover in a second neighboring relationship before the first time, the second neighboring relationship being in a direction opposite to that of the first neighboring relationship, if the difference value is found, calculating the difference value between the first time and the second time for starting the switching of the UE in the found X2 switching record, judging whether the difference value is smaller than a second threshold or not, if the threshold is less than the second threshold, determining that the switching of the UE in the first neighboring cell relation is ping-pong switching, and if the UE is not found or is larger than the second threshold, determining that the UE in the first adjacent cell relation is switched to non-ping-pong switching.
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