KR20070027291A - System and method for analyzing wireless data service quality per subscriber - Google Patents

Abstract

A data call quality analysis system for each wireless data service subscriber is provided to perceive data call speech quality of each subscriber based on a WCDMA(Wideband Code Division Multiple Access) system in real time, and to analyze a cause of deterioration of speech quality, thereby improving customer services as quickly/exactly handling customer dissatisfaction. A charging data collector(510) stores packet coded data, received by being connected with a packet switching device through a charging gateway, in real time. A charging data processor(520) analyzes field information of the stored packet coded data, and extracts a field required for calculating a speech quality index. A charging data storage(530) stores the extracted field in subscriber-unit record type in real time. A speech quality storage(540) periodically stores the speech quality index of a system unit on the basis of the record. A speech quality provider(550) reads the speech quality index from the storages(530,540). A speech quality processor(560) calculates data call speech quality information for each subscriber based on the speech quality index, and analyzes a cause of deterioration of speech quality to display the analyzed results.

Description

Data call quality analysis system and method for wireless data service subscribers {SYSTEM AND METHOD FOR ANALYZING WIRELESS DATA SERVICE QUALITY PER SUBSCRIBER}

1 is a view showing the configuration of a WCDMA-based wireless data service system according to a preferred embodiment of the present invention.

2 is a block diagram showing the configuration of a call quality analysis system according to a preferred embodiment of the present invention.

3 is a view showing a configuration of a call quality processing unit according to a preferred embodiment of the present invention.

4 is an exemplary view showing an interface provided by a call quality processing unit and a processing result according to a value input to the interface according to a preferred embodiment of the present invention.

5 is an exemplary view showing an alarm class setting screen according to a preferred embodiment of the present invention.

6 is a flowchart illustrating a method for analyzing call quality in accordance with a preferred embodiment of the present invention.

* Explanation of Codes on Major Parts of Drawings *

100: terminal 200: Node B

300: RNC 400: Packet Switching Device (SGSN)

500: call quality analysis system 520: billing processing

510: bill collecting section 530: billing storage

540: call quality storage unit 550: call quality providing unit

560: call quality processing unit 600: billing distribution device (BMD)

700: Charging Gateway (CG)

The present invention relates to a call quality analysis system, and more particularly, to a data call quality analysis system and method for each wireless data service subscriber based on WCDMA.

Since the failure message or statistical data of the conventional WCDMA packet node was provided without a service or a subscriber, it was not possible to manage call quality on a subscriber basis.

In addition, call failure data (Call Fail Data, Fault message) output from the WCDMA main node is provided as an analysis data by call unit and subscriber unit, but it represents only the absolute value of the call failure, and does not provide relative call quality.

Accordingly, when a WCDMA-based data service subscriber complains about data call call quality, an employee at a customer contact does not have accurate evidence data, which makes it difficult to process customer complaints.

Accordingly, an object of the present invention is to provide a WCDMA-based wireless data service subscriber data call quality analysis system and method for analyzing subscriber call data quality using WCDMA packet charging (PS-CDR) data. .

In order to achieve the above object, the data call call quality analysis system for each wireless data service subscriber according to an embodiment of the present invention, in the data call call quality analysis system for each wireless data service subscriber, through a packet switching device and a billing gateway A billing collection unit for storing the packet billing data received and connected in real time; A billing processing unit for analyzing field information of the stored packet billing data and extracting a field necessary for calculating a call quality index; A charging storage unit for storing the extracted field in real time as a record for each subscriber; A call quality storage unit periodically storing call quality indicators of a system unit based on the record; A call quality providing unit for reading a call quality indicator from the charging storage unit and the call quality storage unit; And after calculating the call quality information for each subscriber based on the call quality indicators transmitted from the call quality providing unit, characterized in that it comprises a call quality processing unit for analyzing the cause of poor call quality to display the analysis results.

On the other hand, WCDMA-based wireless data service data call call quality analysis method according to another embodiment of the present invention, (a) collecting the packet charging data from the packet switching device in real time; (b) extracting fields necessary for calculating a call quality index by analyzing field information of the collected packet charging data; And (c) storing the extracted field in real time as a record of a subscriber unit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. Like reference numerals refer to like or similar elements throughout the drawings.

1 is a diagram showing the configuration of a WCDMA-based wireless data service system according to a preferred embodiment of the present invention.

As shown in FIG. 1, the system further includes a call quality analysis system 500 in a general WCDMA based wireless data service system. In addition, the charging distribution device 600 may be further included in the WCDMA-based wireless data service system according to an embodiment of the present invention.

The general wireless data service system includes components such as a terminal 100, a Node B 200, an RNC 300, a packet switching device (SGSN, 400), and the like, which are well known in the art. Therefore, detailed description thereof will be omitted.

The call quality analysis system 500 processes the packet charging data of the SGSN 400 in real time and generates traffic and call quality analysis data for each subscriber using the packet charging data. At this time, packet charging data transmission / reception matching between the call quality analysis system 500 and the SGSN 400 is performed through a charging gateway CG 700.

The charging distribution device BMD 600 relays the packet charging data when the packet charging data transmission and reception matching standard between the SGSN 400 and the call quality analysis system 500 is different. Such WCDMA packet charging data is usually composed of binary data having the ASN.1 format.

2 is a block diagram showing the configuration of a call quality analysis system according to a preferred embodiment of the present invention.

As shown in FIG. 2, the call quality analysis system 500 includes: a charging collector 510 for collecting packet charging data from the SGSN 400 in real time; A billing processing unit 520 for analyzing the field information of the collected packet charging data and extracting key field items necessary for calculating a call quality indicator such as a telephone number (MSISDN), a call setup base station, a call termination time and a call termination cause; A charge storage unit 530 for storing call quality analysis charge information extracted from the charge processing unit 520 in real time in all fields related to call quality using a subscriber's telephone number (MSISDN) as a key; A call quality storage unit 540 for periodically storing call quality indicator values of system units (eg, Node B 200, RNC 300, SGSN 400, etc.); A call quality providing unit 550 for providing call quality information of the charging storage unit 530 and the call quality storage unit 540 in response to a search request of the call quality processing unit 560 which will be described later; And a call quality processing unit 560 for inquiring call quality information for each subscriber and analyzing the cause of poor quality and displaying the result.

The bill collecting unit 510 collects and stores the billing generated at the end of the data call in real time by matching with the SGSN 400. In this case, the billing is a packet-based WCDMA wireless data service billing, and the mobile communication generation (2G / 3G, etc.) may be provided by including fields (Diagnostics and Cause for Record Closing) that can infer the call quality in the billing. And regardless of technology (GSM / WCDMA / HSPDA, etc.).

The billing processing unit 520 decodes the binary coded data collected by the billing collection unit 510 in real time, and includes a telephone number (MSISDN), a call setup base station, a call termination time, a cause of call termination, and the like. It extracts key fields necessary for generating the same call quality information and converts them into human readable form.

Here, the main fields necessary for generating the call quality information will be described in detail in Tables 1 and 2 below.

SGSN CDR (S-CDR) field configuration (3GPP TS 32.215 compliant) No Billing  Field name Explanation One Record Type Record Type: S-CDR 2 Network Initiated PDP Context Flag the PDP Context when initialized on the network. 3 Served IMSI IMSI of subscribers receiving services 4 Served IMEI IMEI (International Mobile Equipment Idenity) of the subscriber receiving the service 5 SGSN Address IP address of Current SGSN 6 MS Network Capability Network capability of the mobile station. 7 Routing Area Code (RAC) RAC at Record Opening Time 8 Location Area Code (LAC) LAC at Record Opening Time 9 Cell identifier Cell ID / SAC for GSM at record opening time; LAC format (= MCC + MNC + LAC) 10 Charging ID Identifier that distinguishes the PDP context of all other records generated by GSNs 11 GGSN Address Used Pointer to the IP address of the control plane of the current GGSN. The address of the GGSN is always the same as the activated PDP context. 12 APN Network Identifier Logical name of the point of connection to an external packet data network. 13 PDP Type PDP type such as IP, PPP, IHOSS: OSP. 14 Served PDP Address Served IMSI's PDP address, expressed as IPv4 or IPv6. This parameter is present except when both PDP types of PPP or dynamic PDP addressing are used. 15 List of Traffic Data Volumes List of changed charging conditions in the PDP context. Each change is time stamped. Charging conditions are used to classify traffic volumes such as Qos / tariff periods. At initialization or next time, the data volume corresponding to the changed QoS is listed. 16 Record Opening Time Time stamp when the PDP context starts to work on this SGSN or when the next partial record starts. 17 Duration The duration of this record in SGSN is the time from Record Opening Time to Record Closure. The duration in a partial record is not an accumulated value. 18 SGSN Change Shows that this is the first record after the internal SGSN routing area is updated. 19 Cause for Record Closing Indicates the reason for closing the record in this SGSN. 20 Diagnostics Reason for the end of the call. Together with Cause for Record Closing, the cause of the call termination can be expressed in more detail. 21 Record Sequence Number The number of consecutive records this node creates, numbered sequentially, including all CDR types. Created only on partial records. 22 Node ID Identifier specified by the operator of the recording entity (record generating) of the node providing the CDR 23 Record Extensions For business or manufacturer expansion (details not defined) 24 Local Record Sequence Number The number of consecutive records this node creates, numbered sequentially, including all CDR types. 25 APN Selection Mode Represents how to select the APN to be used. 26 APN Operator Identifier Logical name of the point of connection to an external packet data network. 27 Served MSISDN Subscriber's Primary MSISDN (Phone Number) 28 Charging characteristics Charging characteristics used by SGSN 29 System type Shows what type of air interface is used. For example UTRAN or GERAN. This field is represented when using the UTRAN or GERAN air interface. It is omitted from services provided by the GSM air interface. 30 CAMEL Information A collection of CAMEL information related to PDP context. This field is represented when a CAMEL service is provided. -SCF (Service Control Function) address-Service Key-Default Transaction / SMS Handling-Free Format Data-FFD Append Indicator-Level of CAMEL services-Number of DPs encountered 31 RNC Unsent Downlink Volume Downlink Data Volume not sent from MS to RNC. The RNC provides a Downlink Volume Count that could not be sent at the time of the RAB Release. 32 Charging Characteristics Selection Mode Contains information about how the features of Charging were selected. 33 Dynamic Address Flag Indicates whether the running PDP Address is dynamic (address given during the PDP Context), which is not shown if the address is fixed.

Detailed description by main extraction field Billing  Field name Explanation Served IMEI IMEI is an identifier that identifies the handset manufacturer and handset model. In conjunction with the terminal model DB released by the operator informs the terminal model used by the subscriber. It is possible to determine whether the cause of the deterioration is due to a defect of a specific terminal model. SGSN Address It informs relevant SGSN information about individual data calls. Cell identifier Represents a base station (sector) with a call set up. In the case of WCDMA, Cell ID means Service Area Code (SAC), which is unique worldwide. In conjunction with the service provider's configuration information management system, the base station ID using only a number can be expressed as a base station name / base station address. Charging ID SGSN creates a separate partial record for billing convenience when an ongoing data call exceeds or exceeds a certain data volume. Charging ID is a common key to group these partial charges in call units. List of Traffic Data Volumes This field indicates the amount of data transmitted on the uplink / downlink and the QoS-related attribute values. This system provides the following call-level QoS indicators. -Concordance rate-Decrease rate-Quality deterioration rate Definition and calculation methods for each quality index are as follows. <QoS indicator definition> 1. Concordance rate: The ratio of Attributes with the same value of Requested and Negotiated 2. Degradation rate: The ratio of Attributes whose value of Negotiated is lower than the value of Requested 3. Quality deterioration rate: Applicable among QoS Numerical value of attribute deterioration. In other words, it is calculated by dividing the amount of dropped grades by the total number of grades. <QoS Indicator Calculation Formula> 1. Concordance rate = Number of Partial CDRs with different Requested and Negotiated values / Total Partial CDRs 2. Decreased rate = Number of Partial CDRs with Total Negotiated values lower than the value requested by Requested Number of CDRs 3. Quality deterioration rate = number of deteriorated grades / total number of grades ■ Example of calculating the quality deterioration rate For example, there are three grades of High, Normal, and Low in the Priority category among attributes. Is as follows. High-> Normal: 1 (Quality Reduction Ratio = 1/2 = 50%) High-> Low: 2 (Quality Reduction Ratio = 2/2 = 100%) If so, the quality deterioration rate is calculated as n / (N-1) * 100. Data volume is used to query the data usage of the subscriber or to evaluate the sales-based rating. The sales-based rating is a rating given to the average usage per subscriber of the operator. Record Opening Time It means the time when the data call is generated. This visual information is used to view trends by date or to see details of individual calls. Cause for Record Closing This indicates the cause that terminated the billing record and terminated the ongoing data call in SGSN. The cause of termination is one of three things: -Normal end call (meaning: service is terminated normally)-Incomplete call (meaning: failure call during setup)-Truncation call (meaning: abnormal end call in progress) Through this field, the cutting rate, which is one of data quality, can be determined. Calculate. The formula for calculating the cutting rate is as follows. ■ Cut rate (%) = Trunk / (Normal Exit + Trunk) * 100 For example, a total of 100 billing records were generated, of which 81 were normal exits, 10 were incomplete, and 9 were cuts. If so, the cutting rate would be 9 / (81 + 9) * 100 = 9/90 * 100 = 10%. Diagnostics Detailed cause of the call termination, together with the Cause for Record Closing field. For example, in the case of a cutting arc, it is possible to know whether it is the cause of an air section or a network problem. Served MSISDN This refers to the subscriber's MSISDN (subscriber's phone number, Mobile Station ISDN), and includes the country code (eg 82 in Korea). This key is used when the user searches for data call quality by subscriber in the client program. In addition, the system of the present embodiment performs a DB Query by using the MSISDN as a key at the request of the client. RNC Unsent Downlink Volume It means Downlink Data Volume which RNC terminal could not send to terminal. Since the unsent volume is directly or indirectly related to the radio quality, quality information (RNC Unsent occurrence rate and RNC Unsent Data rate) can be obtained by comparing with the downlink traffic volume in the List of Traffic Data Volumes field. The following shows the definition of each indicator. <Definition> ■ RNC Unsent Incidence Rate: RNC Unsent Data Rate among all billing records ■ RNC Unsent Data Rate: Ratio of RNC Unsent Data Volume to Total Downlink Volume

Meanwhile, the charging storage unit 530 stores all of the call quality related fields extracted from the charging processing unit 520 in real time using the calling and / or called subscriber's telephone number (MSISDN) as a key among the charging records. The user of the call quality analysis system 500 maps the billing information and the customer management information (CRM) data of the mobile carrier to facilitate the call quality consultation and analysis. Further information such as call charges may be obtained. In addition, the billing storage unit 530 uses a memory DB to quickly respond to a user's search request of the call quality analysis system 500, but if the packet billing data is not much or the hardware specification is sufficiently high performance general hard You can also use a disk.

The call quality storage unit 540 periodically stores and manages call quality indicators of the entire network of wireless data service providers or individual systems of SGSN / RNC / Node B levels based on the charge record of the charge storage unit 530. . This is to determine whether the call quality of each subscriber is good or bad compared to the service provider's average. For example, by comparing the quality of a particular subscriber with the quality of the entire network or the corresponding base station in the service area, it is possible to determine whether the poor quality is caused by the subscriber alone or the poor call processing of the system.

The call quality providing unit 550 provides the call quality processing unit 560 with call quality information of the charge storage unit 530 and the call quality storage unit 540 in response to the search request of the call quality processing unit 560. . In this case, the call quality providing unit 550 is established in a server and client relationship with the call quality processing unit 560, and is always connected to the call quality processing unit 560 through a database session, and the call quality processing unit 560 is provided. Analyzes the search request in real time, executes an appropriate database search command, and transmits the result to the call quality processing unit 560.

The call quality processing unit 560 provides a user interface that allows a user of the call quality analysis system 500 to easily access the system, and retrieves call quality information for each subscriber in a desired form, and details thereof. Provides various functions to perform cause analysis. The various functions provided by the call quality processing unit 560 will be described in more detail with reference to the accompanying drawings.

3 is a view showing the configuration of the call quality processing unit according to a preferred embodiment of the present invention, Figure 4 is an interface provided by the call quality processing unit according to a preferred embodiment of the present invention and the processing result according to the value input to the interface It is an exemplary figure which shows.

As shown in FIG. 3, the call quality processing unit 560 includes a phone number input unit 561, a search date setting unit 562, a threshold setting unit 563, a rating setting unit 564, and a call quality display unit. 565, an interfacing screen with the user is shown in FIG. 4.

First, the telephone number input unit 561 receives a subscriber's telephone number (MSISDN) to search for call quality information. The subscriber's telephone number may register only one specific subscriber (personal registration), or may enter a plurality of subscribers registered in advance (group registration). In the case of searching by registering as a group, the call quality of the grouped users is not the call quality of individual subscribers.

The search date setting unit 562 receives a date to search. A weekly search as well as a daily search is possible.

The threshold setting unit 563 provides a user interface as shown in FIG. 5 and generates a Visible Alarm when each call quality indicator is lowered by a predetermined level or more compared to the network average value.

The rating setter 564 indicates a rating of the sales point of view of the subscriber to be queried. Preferably, a grade of A / B / C / D / E is given by comparing the call volume generated during the inquiry period with the average call volume per subscriber of the service provider. If it is close to the average, it will be close to C, A for high volume, and E for low volume. Users of the call quality analysis system 500 according to the present embodiment may use this information to vary the level of response to the customer.

The call quality display unit 565 displays the date / week call quality index of the subscriber to be viewed for the set period in the form of a chart and a spreadsheet.

The chart-type graphs 565a and 465b not only display the subscriber's average call quality (target for specific quality indicators), but also easily compare with the network average of the entire search period to visually determine whether the call quality is good or bad. can do. Also, for each voice call quality, a graph area indicating which quality indicators are particularly low by comparing the network average of the search period and the subscriber average is provided.

Spreadsheets 565c and 465d show subscriber call quality information by date or week, and provide a function of selecting a specific date and inquiring detailed call history generated on that date. In addition, the spreadsheets 565c and 465d display a separate spreadsheet for all the base stations that call on a specific date when the specific date is selected so that the user can determine whether the call quality is low at the specific base station. Each call quality indicator of all the spreadsheets is marked in red so as to be easily recognized by the user when the threshold value set by the threshold setting unit 563 is lowered.

Hereinafter, the operation of the call quality analysis system 500 for each wireless data service subscriber according to the present invention will be described with reference to FIG.

First, the call quality analysis system 500 collects packet charging data for a data call in real time from the SGSN 400 (S610). In this case, the packet charging data is WCDMA-based packet charging data, and occurs at the end of a call of the calling terminal and / or the receiving terminal.

Subsequently, the collected packet quality data is analyzed to extract a call quality index (S620). At this time, the field items necessary for calculating the call quality index may include, for example, a telephone number (MSISDN), a call setup base station, a call end time, a cause of call termination, and the like. On the other hand, since Table 1 and Table 2 fully explained, it will be omitted below.

Then, the main items of the extracted call quality indicators are stored in real time (S630). Preferably, the calling and / or called party subscriber telephone number (MSISDN) is stored as a key.

Meanwhile, based on the record of the packet charging data stored in the step 630, the call quality indicator of the system unit is periodically stored (S640). Here, the record of the packet charging data means a main item of the call quality index.

Subsequently, when the operator of the call quality analysis system 500 requests the call quality information inquiry for each subscriber, the call quality index of the system unit and the stored call quality index for each subscriber are read to calculate call quality information for each subscriber. In order to analyze the cause of poor call quality, the analysis result is provided (S650-S660).

While the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will recognize that various modifications or changes can be made without departing from the spirit and scope of the invention.

As described above, according to the present invention, it is possible to grasp the data call call quality in real time for each WCDMA-based wireless data service subscriber and to analyze the cause of the call quality degradation. It can be improved, and by processing customer complaints quickly and accurately, it is possible to provide better service quality.

Claims (14)

In WCDMA based wireless data service subscriber data call call quality analysis system, A charging collector configured to store packet charging data received through a packet switching device and a charging gateway in real time; A billing processing unit for analyzing field information of the stored packet billing data and extracting a field necessary for calculating a call quality index; A charging storage unit for storing the extracted field in real time as a record for each subscriber; A call quality storage unit periodically storing call quality indicators of a system unit based on the record; A call quality providing unit for reading a call quality indicator from the charging storage unit and the call quality storage unit; And After calculating the call quality information for each subscriber based on the call quality indicators transmitted from the call quality providing unit, WCDMA-based characterized in that it comprises a call quality processing unit for displaying the analysis results by analyzing the cause of poor call quality Data quality call quality analysis system for each wireless data service subscriber. The method of claim 1, wherein the fields required for calculating the currency quality indicators are: WCDMA-based wireless data service subscriber data call quality analysis system comprising a telephone number (MSISDN), the location of the base station set up the data call, the data call start time, the data call end time and the cause of the data call termination. The method of claim 1 or 2, wherein the billing unit, WCDMA-based wireless data service subscriber data call quality analysis system, characterized in that for receiving the packet charging data generated at the end of the data call of the originating and / or receiving terminal from the packet switching device. According to claim 1 or 2, wherein the charging storage unit, WCDMA-based wireless data service data call call quality analysis system, characterized in that for storing the telephone number (MSISDN) as a key (Key). The method of claim 1 or 2, wherein the call quality processing unit, WCDMA-based wireless data service data call call quality analysis system, characterized in that to provide at least one user interface (User Interface) for providing call quality information for each subscriber. The method of claim 5, wherein the user interface, WCDMA-based wireless data service data call call quality analysis system, characterized in that at least one or more of the subscriber telephone number input, search date settings, subscriber rating settings or threshold settings can be set. In the call quality analysis system for each wireless data service subscriber, A call quality analysis server which processes the packet charging data provided from the packet switching apparatus in real time and generates and displays the traffic and data call call quality analysis result for each subscriber using the packet charging data; And And a charging gateway for relaying the packet charging data from the packet switching apparatus to the call quality analysis server. The method of claim 7, wherein the call quality analysis server, A packet charging collector configured to store packet charging data received through a packet switching device and a charging gateway in real time; A packet charging processing unit configured to extract field necessary for calculating a call quality index by analyzing field information of the stored packet charging data; A packet charging storage unit which stores the extracted field in real time as a record of a subscriber unit; A call quality storage unit periodically storing call quality indicators of a system unit based on the record; And After calculating the call quality information for each subscriber based on the call quality indicators from the packet charge storage unit and the call quality storage unit, the call quality processing unit for analyzing the cause of poor call quality and displaying the analysis result Wireless data service call quality analysis system for each subscriber. WCDMA based wireless data service subscriber data call call quality analysis method, (a) collecting packet charging data in real time from the packet switching apparatus; (b) extracting fields necessary for calculating a call quality indicator by analyzing field information of the collected packet charging data; And and (c) storing the extracted field in real time as a record of a subscriber unit. The method of claim 9, (d) periodically storing call quality indicators per system based on the records stored in step (c); And (e) When the call quality information inquiry by the subscriber is requested, the call quality index of the system unit and the real-time stored call quality indicators are read to calculate the call quality information by the subscriber, and then analyze the cause of the poor call quality. WCDMA-based wireless data service subscriber data call quality analysis method comprising the step of displaying the result. The method of claim 9 or 10, wherein the step (a), WCDMA-based wireless data service subscriber data call quality analysis method characterized by collecting the packet charging data generated at the end of the data call. The method of claim 9 or 10, wherein step (b), And analyzing the field information of the collected packet charging data, extracting a telephone number, a data call setup base station, a data call termination time, and a cause of the data call termination. The method of claim 9 or 10, wherein step (c), WCDMA-based wireless data service data call call quality analysis method characterized in that the subscriber number (MSISDN) is stored as a key (Key). In the call quality analysis method for each wireless data service subscriber, Process of processing the packet charging data provided from the packet switching device in real time, and generating the traffic and data call call quality analysis results for each subscriber using the packet charging data, the data call call quality analysis method for each wireless data service .

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