CN102083092B - Method and device for searching weakly covered cells in time division-synchronous code division multiple access (TD-SCDMA) network - Google Patents

Abstract

The invention discloses a method and device for searching a weak coverage cell in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) network. and handover failure report; extract the handover that takes place from TD-SCDMA network to global mobile communication network (GSM) handover all records from the handover success report, and extract the source cell identification in each record; from handover failure report Extract all the records that the handover that takes place is handover from TD-SCDMA network to GSM network, and extract the source cell identification in each record; sort the extracted source cell identifications according to the predetermined rules, and sort them in The cell corresponding to the source cell identifier of the first N digits is determined to be a weak coverage cell. By applying the method and device of the present invention, weak coverage cells can be found in time and accurately, and costs can be saved.

Description

Method and device for searching weakly covered cells in time division synchronous code division multiple access network

technical field

The present invention relates to Time Division-Synchronous Code Division Multiple Access (TD-SCDMA, Time Division-Synchronous Code Division Multiple Access) technology, in particular to a method and device for searching weak coverage cells in a TD-SCDMA network.

Background technique

With the issuance of China's third-generation mobile communication system (3G, 3rd-generation) licenses, at present, in many cities, including most first-tier cities and some second-tier cities, TD-SCDMA networks have been built to provide TD-SCDMA business. Correspondingly, the construction of the new network has also brought many new problems to operators, for example, how to find out the cell with weak coverage in the TD-SCDMA network, so as to improve the signal condition of the cell, etc.

Ideally, it is hoped that the traditional 2G network, such as the weak coverage cell search method in the Global System for Mobile Communications (GSM, Global System for Mobile Communications), can be directly applied to the TD-SCDMA network.

In the traditional GSM network, the driving test (DT, Drive Test), dialing quality test (CQT, Call Quality Test), or user complaints can be used to find weak coverage cells. Among them, the DT test means that the tester drives to the test area, and then uses a special instrument to test the signal coverage of the area; the CQT test means that the tester arrives at the test area and communicates with the tester to test the area. signal coverage.

However, there are certain problems in the above-mentioned processing methods in practical applications. For example, for the two methods of finding weak coverage cells through DT testing and CQT testing, it is necessary to spend a lot of time due to the need for testers to arrive at the test area. Manpower and material resources increase the cost; moreover, for some test areas, it may be difficult for test personnel to reach, and accordingly, the test work cannot be carried out, that is to say, if these areas are weak coverage cells, then they will not be found ; For the method of finding weak coverage cells according to the user's complaint, because this method is to solve the problem after it occurs, the processing is not timely enough, so it will cause the user's satisfaction to decline.

It can be seen that there are certain problems in the weak coverage cell search methods in the existing GSM network, and it is not an ideal solution to the problem.

Contents of the invention

In view of this, the present invention provides a search method for weakly covered cells in a time-division synchronous code division multiple access network, which can find out weakly covered cells in time and accurately, and can save costs.

The invention also provides a search device for weakly covered cells in a time-division synchronous code division multiple access network, which can find out weakly covered cells in time and accurately, and can save costs.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A method for searching a cell with weak coverage in a time division synchronous code division multiple access network, the method comprising:

A. Obtain a handover success report and a handover failure report for recording each handover situation in the time division synchronous code division multiple access TD-SCDMA network;

B, extracting the handover that takes place is all records handed over from the TD-SCDMA network to the global mobile communication network GSM from the described handover success report, and extract the source cell identification in each record;

C, extracting all records that the handover that takes place is handover from TD-SCDMA network to GSM network from described handover failure report, and extract the source cell identification in each record;

D. Sorting the extracted source cell identities according to predetermined rules, and determining the cells corresponding to the top N source cell identities after sorting as weak coverage cells; said N is a positive integer.

Preferably, said sorting the extracted source cell identities according to predetermined rules includes:

The extracted source cell identities are sorted in descending order of the number of occurrences of the source cell identities.

Preferably, all records that extracting the handover that takes place are from TD-SCDMA network to GSM network include:

By analyzing the network to which the source cell ID belongs and the network to which the target cell ID belongs, it is determined and extracted that all records of the handover from the TD-SCDMA network to the GSM network are taken.

A search device for a weakly covered cell in a time-division synchronous code division multiple access network, the device comprising:

An acquisition unit, configured to acquire a handover success report and a handover failure report for recording each handover situation in the time division synchronous code division multiple access TD-SCDMA network;

An extracting unit, used to extract from the handover success report all records that the handover that takes place is handover from the TD-SCDMA network to the global mobile communication network GSM, and extract the source cell identity in each record; at the same time, from the In the above-mentioned handover failure report, extract the handover that takes place as all records handed over from the TD-SCDMA network to the GSM network, and extract the source cell identification in each record;

The search unit is configured to sort the extracted source cell identities according to predetermined rules, and determine the cells corresponding to the top N source cell identities after sorting as weak coverage cells; the N is a positive integer.

Preferably, the extraction unit includes:

The first extracting subunit is used to extract the handover from the TD-SCDMA network to the GSM network from the handover success report and the handover failure report by analyzing the network to which the source cell identity belongs and the network to which the target cell identity belongs. All records of network switching;

The second extracting subunit is used to extract the source cell identifier from each extracted record.

Preferably, the search unit sorts the extracted source cell identities in descending order of the number of occurrences of each source cell id.

Visible, adopt technical scheme of the present invention, by analyzing handover success report and handover failure report, obtain the handover that takes place of recording respectively to be all records handover from TD-SCDMA network to GSM network, and each source that extracts The cell IDs are sorted according to a predetermined rule, and the cells corresponding to the source cell IDs in the top N positions after sorting are determined as weak coverage cells. Compared with the prior art, the solution of the present invention does not require testers to reach the test area, so it saves manpower and material resources, reduces costs, and does not involve weak coverage cells caused by the inability of testers to reach the test area Problems that cannot be found, so the accuracy of search is improved; moreover, the scheme of the present invention can be executed at any time according to needs, so that weak coverage cells can be found in time before users complain, and user satisfaction is improved.

Description of drawings

Fig. 1 is a flowchart of a method embodiment of the present invention.

Fig. 2 is a schematic diagram of the composition and structure of an embodiment of the device of the present invention.

Detailed ways

Aiming at the problems existing in the prior art, the present invention proposes a brand-new search method for weakly covered cells in a TD-SCDMA network, which can not only find weakly covered cells in time and accurately, but also save costs.

In a traditional GSM network, if a terminal switches from a cell with normal signal coverage to a cell with weak coverage during communication, such as a voice call, the voice call will be dropped, resulting in voice handover failure. However, in a TD-SCDMA network, if the terminal performs voice handover from a cell with normal signal coverage to a cell with weak coverage, the following three situations may further occur:

1) If the signal coverage of the GSM network in the area where the weak coverage cell of the TD-SCDMA network is located is normal, then hard handover to the GSM network normally;

2) If the signal coverage of the GSM network in the area where the weak coverage cell of the TD-SCDMA network is located is normal, but the handover failure may occur during the hard handover process due to the wrong configuration of the adjacent cell;

3) If the signal coverage of the GSM network in the area where the weak coverage cell of the TD-SCDMA network is located is also weak coverage, the handover fails.

Since the TD-SCDMA network is still in the early stage of network construction, and the network optimization and maturity are not yet perfect, there will be more weak coverage areas, while all aspects of the GSM network have been relatively complete, so there are few weak coverage cells. Therefore, the above Among the three cases, the occurrence probability of the third) case is very low.

However, the existing TD-SCDMA network usually automatically records each handover of each terminal within its own coverage area, that is, every time a handover occurs in the network, a corresponding record is generated to record the handover information of this handover, including handover The source cell identification (ID, Identification) before the handover, the target cell ID after the handover, and the reason for the handover, etc. Wherein, the reason for the handover may be that the cell signal of the TD-SCDMA network is weak as mentioned above, so the handover to the GSM network may be, or the location of the terminal may move. Usually, if a handover is finally successful, the handover information corresponding to the handover will be recorded in the handover success report, and if the handover fails, the corresponding handover information will be recorded in the handover failure report.

Therefore, in this embodiment, by analyzing the handover information recorded in the handover success report and the handover failure report, it is possible to find out some cells in which the handover behavior from the TD-SCDMA network to the GSM network occurs the most, and determine these cells as Weak coverage cells.

The specific implementation of the scheme of the present invention includes: firstly, obtaining a handover success report and a handover failure report for recording each handover situation in the TD-SCDMA network; All records of handover from SCDMA network to GSM network, and extract the source cell identifier in each record, extract all records of handover from TD-SCDMA network to GSM network from the handover failure report, and extract each The source cell identifiers in the records; finally, the extracted source cell identifiers are sorted according to predetermined rules, and the cells corresponding to the source cell identifiers in the top N positions after sorting are determined as weak coverage cells, and N is a positive integer.

Usually, sorting is performed according to the descending order of the number of appearances of each source cell identifier. Of course, it is also possible to use other sorting methods. For example, according to network settings and other conditions, different weights are set for different cells, and then calculated by a certain algorithm, and sorted according to the calculated results. The specific sorting method to be used may be determined according to actual needs, and is not limited in the scheme of the present invention.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

Fig. 1 is a flowchart of a method embodiment of the present invention. As shown in Figure 1, the following steps are included:

Step 101: Obtain a handover success report and a handover failure report for recording each handover situation in the TD-SCDMA network.

If a certain handover is successful, the handover information of this handover will be recorded in the handover success report, and if a certain handover fails, the handover information of this handover will be recorded in the handover failure report. The recorded handover information includes: the ID of the source cell before the handover, the ID of the target cell after the handover, and the reason for the handover.

For different TD-SCDMA networks, according to different core network switches, the specific recording methods and recording locations of the handover success report and handover failure report may be different. For example, for a TD-SCDMA network in which the core network switch is a Nokia Siemens Network Company (NSN, Nokia Siemens Network Company) device, the handover success report HO and the handover failure report FHO are all recorded in the PRFILE configuration of the NSN device (including Other information), extract HO and FHO through real-time network monitoring instrument (TNES, Traffica Network Element Servers) and store them in the specified location, and then analyze the stored HO and FHO.

How to obtain the handover success report and the handover failure report is well known in the art and will not be repeated here.

Step 102: Extract all records of handover from TD-SCDMA network to GSM network from the handover success report, and extract the source cell identifier in each record.

Step 103: Extract all records of handover from TD-SCDMA network to GSM network from the handover failure report, and extract the source cell identifier in each record.

In steps 102 and 103, it is possible to determine which of all the records in the handover success report and the handover failure report are related to the slave TD-SCDMA network by analyzing the network to which the source cell identifier and the destination cell identifier belong to for each record. Records of handover to GSM network.

Step 104: sort the extracted source cell identities in order of the number of occurrences of each source cell id from more to less, and determine the cell corresponding to the top N source cell identities after sorting as a weak coverage cell; N is positive integer.

The specific value of N can be determined according to actual needs.

The specific implementation of steps 102-104 will be further described in detail below through specific examples:

Suppose a total of 20 records are extracted from the switching success report (of course, the actual number of records should be much greater than 20, and this is only for the convenience of subsequent expression), and they are respectively numbered as record 1 to record 20, and the 20 records are extracted respectively. Source cell ID, as shown in Table 1:

Record source cell ID record 1 Source cell ID 1 record 2 Source cell ID 3 Record 3 Source cell ID 2 record 4 Source cell ID 5 Record 5 Source cell ID 7 Record 6 Source cell ID 4 Record 7 Source cell ID 6 record 8 Source cell ID 3 Record 9 Source cell ID 8 Record 10 Source cell ID 4 Record 11 Source cell ID 4 Record 12 Source cell ID 1 Record 13 Source cell ID 2 Record 14 Source cell ID 9 Record 15 Source cell ID 4 Record 16 Source cell ID 6 Record 17 Source cell ID 3 Record 18 Source cell ID 3 Record 19 Source cell ID 4 Record 20 Source cell ID 2

Table 1 The source cell identifier corresponding to each record extracted from the handover success report

It can be seen that a total of 9 source cell IDs are involved, among which, source cell ID 1 appears 2 times, source cell ID 2 appears 3 times, source cell ID 3 appears 4 times, and source cell ID 4 appears 5 times , the source cell ID 6 appears twice, and the source cell IDs 5, 7, 8, and 9 each appear once.

Suppose a total of 10 records are extracted from the handover failure report, respectively numbered as record 1 to record 10, and the source cell identifiers in these 10 records are respectively extracted, as shown in Table 2:

Record source cell ID record 1 Source cell ID 4 record 2 Source cell ID 2 Record 3 Source cell ID 4 record 4 Source cell ID 3 Record 5 Source cell ID 1 Record 6 Source cell ID 5 Record 7 Source cell ID 5 record 8 Source cell ID 2 Record 9 Source cell ID 2 Record 10 Source cell ID 4

Table 2 The source cell identifier corresponding to each record extracted from the handover failure report

It can be seen that the source cell ID 1 appeared once, the source cell ID 2 appeared three times, the source cell ID 3 appeared once, the source cell ID 4 appeared three times, the source cell ID 5 appeared twice, and the source cell ID 5 appeared twice. None of the cell identities 6, 7, 8 and 9 are present.

Sum the number of occurrences of each source cell identity twice, and sort according to the order of the number of occurrences of each source cell identity after the summation, as shown in Table 3:

source cell ID The number of occurrences Source cell ID 4 8 Source cell ID 2 6 Source cell ID 3 5 Source cell ID 1 3 Source cell ID 5 3 Source cell ID 6 2 Source cell ID 7 1 Source cell ID 8 1 Source cell ID 9 1

Table 3 Ranking of occurrence times of each source cell identifier

In practical applications, since the source cell ID 4, the source cell ID 2, and the source cell ID 3 appear frequently, the cells corresponding to these three IDs can be determined as weak coverage cells.

Subsequently, related processing can be performed on the determined weak coverage cell as required, such as informing relevant personnel to enhance the signal strength of the cell, etc.; in addition, the GSM network after handover corresponding to the determined weak coverage cell can be further extracted. The target cell identity of the target cell, so as to optimize the GSM network according to the needs. Since these contents are not directly related to the solutions of the present invention, they will not be introduced.

Based on the above method, FIG. 2 is a schematic diagram of the composition and structure of an embodiment of the device of the present invention. As shown in Figure 2, it includes: an acquisition unit 21, an extraction unit 22 and a search unit 23;

An acquisition unit 21, configured to acquire a handover success report and a handover failure report for recording each handover situation in the TD-SCDMA network;

Extraction unit 22, is used for extracting all records that the handover that takes place is handover from TD-SCDMA network to GSM network from handover success report, and extracts the source cell identification in each record; Simultaneously, extracts from handover failure report Extract all the records of handover from TD-SCDMA network to GSM network, and extract the source cell identifier in each record;

The search unit 23 is configured to sort the extracted source cell identities according to a predetermined rule, and determine the cell corresponding to the top N source cell identities after sorting as a weak coverage cell, where N is a positive integer.

Wherein, the extracting unit 22 may further include:

The first extraction subunit 221 is used to extract the handover from the TD-SCDMA network to the GSM network from the handover success report and the handover failure report by analyzing the network to which the source cell identity belongs and the network to which the target cell identity belongs. All records switched;

The second extracting subunit 222 is configured to extract the source cell identifier from each extracted record.

Specifically, the search unit 23 may sort the extracted source cell identities in descending order of the number of occurrences of the source cell identities.

For the specific working process of the device shown in FIG. 2 , please refer to the corresponding description in the method embodiment shown in FIG. 1 , which will not be repeated here.

In a word, by adopting the technical solution of the present invention, by analyzing the handover success report and the handover failure report, the handover that takes place in the respective records is obtained as all records of handover from the TD-SCDMA network to the GSM network, and extracts all records in each record. The extracted source cell identities are sorted according to predetermined rules, and the cells corresponding to the top N source cell identities after sorting are determined as weak coverage cells. Compared with the prior art, the solution of the present invention does not require testers to reach the test area, so it saves manpower and material resources, reduces costs, and does not involve weak coverage cells caused by the inability of testers to reach the test area Problems that cannot be found, so the accuracy of search is improved; moreover, the scheme of the present invention can be executed at any time according to needs, so that weak coverage cells can be found in time before users complain, and user satisfaction is improved.

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (4)

1. a search method for weakly covered sub-district in a time division synchronous code division multiple access network, it is characterized in that, the method comprises: A. Obtain a handover success report and a handover failure report for recording each handover situation in the time division synchronous code division multiple access TD-SCDMA network; B, extracting the handover that takes place is all records handed over from the TD-SCDMA network to the global mobile communication network GSM from the described handover success report, and extract the source cell identification in each record; C, extracting all records that the handover that takes place is handover from TD-SCDMA network to GSM network from described handover failure report, and extract the source cell identification in each record; D. Sorting the extracted source cell identifiers according to predetermined rules, and determining the cells corresponding to the source cell identifiers in the top N positions after sorting as weak coverage cells; the N is a positive integer; Wherein, all records that the handover that takes place is extracted from TD-SCDMA network to GSM network include: By analyzing the network to which the source cell ID belongs and the network to which the target cell ID belongs, it is determined and extracted that all records of the handover from the TD-SCDMA network to the GSM network are taken. 2. The method according to claim 1, wherein said sorting the extracted source cell identifiers according to predetermined rules comprises: The extracted source cell identities are sorted in descending order of the number of occurrences of the source cell identities. 3. A search device for a weakly covered sub-district in a time-division synchronous code division multiple access network, characterized in that the device comprises: An acquisition unit, configured to acquire a handover success report and a handover failure report for recording each handover situation in the time division synchronous code division multiple access TD-SCDMA network; An extracting unit, used to extract from the handover success report all records that the handover that takes place is handover from the TD-SCDMA network to the global mobile communication network GSM, and extract the source cell identity in each record; at the same time, from the In the above-mentioned handover failure report, extract the handover that takes place as all records handed over from the TD-SCDMA network to the GSM network, and extract the source cell identification in each record; A search unit, configured to sort the extracted source cell identities according to predetermined rules, and determine the cells corresponding to the top N source cell identities after sorting as weak coverage cells; the N is a positive integer; Wherein, the extraction unit includes: The first extracting subunit is used to extract the handover from the TD-SCDMA network to the GSM network from the handover success report and the handover failure report by analyzing the network to which the source cell identity belongs and the network to which the target cell identity belongs. All records of network switching; The second extracting subunit is used to extract the source cell identifier from each extracted record. 4 . The device according to claim 3 , wherein the searching unit sorts the extracted source cell identities in descending order of the occurrence times of each source cell identities.

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