KR100642580B1 - Method for generating traffic information using Call Detail Record - Google Patents

Abstract

The present invention relates to a method of generating traffic information using call log information, and receives call record information of a mobile terminal that terminates a call from an exchange, and when the traffic information generation cycle time is reached, base station identification information included in the call log information is received. After the extracted base station identification information is compared with the stored sample base station identification information, it is determined whether the sample base station is in the unit section. If all of the base stations that the mobile terminal has called are sample base stations in the unit section, the mobile terminal is selected as a sample target. The distance between the base stations extracted from the predetermined database storing the call time, the call start base station and the call end base station from the call log information of each valid sample of the set number of sampled objects, and the distance information between base stations is stored. And calculating the average hourly speed using the talk time. . The present invention has the effect of obtaining the traffic situation in real time by selecting a valid sample of reliability using the call log information of the mobile terminal that talked on the road and generating traffic information using the selected valid sample. .

Traffic information, call log information, valid sample, average speed, road

Description

Traffic information generation method using call log information {Method for generating traffic information using Call Detail Record}

1 is a block diagram showing a navigation system using a general mobile phone.

2 is a flowchart illustrating a method of operating a navigation system using a conventional mobile phone shown in FIG. 2.

Figure 3 is a schematic diagram showing a system to which the traffic information generation method using the call log information according to the present invention is applied.

4 is a view showing an installation state of base stations used in the present invention.

5 is a flowchart illustrating a valid sample selection process using call log information according to an embodiment of the present invention.

6 is a flowchart illustrating a process of generating traffic information using a valid sample according to an embodiment of the present invention.

The present invention relates to an additional service for mobile communication, and in particular, to select a reliable road rider using telephone usage record information obtained from an exchange of a mobile communication network, and to generate traffic information by grasping the movement information of the selected road rider. The present invention relates to a traffic information generation method using call log information.

The Car Navigation System receives location information from the current location of the vehicle and combines it with geographic information to provide various services such as route guidance, traffic guidance, surrounding information and additional information. As a cutting-edge technology, it combines the Global Positioning System (GPS) technology with the Geographic Information System (GIS), which provides the driver with directions through the display screen and voice. It is already commercialized and used for smooth land transportation and operation such as truck and quick service.

On the other hand, mobile devices such as PDAs (Personal Digital Assistants) are equipped with GPS to show their location with a map and provide information on nearby traffic, shopping, restaurants, etc. GPS technology is being applied.

In addition, the vehicle is equipped with a telematics device, a compound word combining telecommunication and informatics, which combines wireless mobile communication, GPS technology, geographic information system (GIS), and call center technology to the driver. It is developing into the concept of mobile office by combining real-time traffic and living information with emergency method, remote vehicle diagnosis, vehicle accident, anti-theft, driving route guidance, in-car control, audio system, and display.

However, in order to receive the above services, there is a problem that can be provided only by installing expensive telematics devices for supporting wireless mobile communication, GPS technology, and Geographic Information System (GIS).

Therefore, in order to provide real-time traffic and living information and driving directions using a mobile phone owned by most drivers, handsfree is equipped with a GPS to find out the location of the vehicle, and then access the Internet through the mobile phone. Are provided.

1 is a block diagram showing a navigation system using a general mobile phone.

As shown here, the mobile phone 40 for wireless communication through the wireless communication network 50 and the service center 60 connected to the wireless communication network 50 analyzes traffic information in real time and calculates an optimal route; In addition, the GPS receiver 10 and the direction sensor 22 and the acceleration sensor 24 for grasping the current position information from the satellite and store the position information obtained from the GPS receiver 10 as well as the mobile phone 40 Access to the service center 60 through the control of the location information transmission and reception of various information, and equipped with a navigation unit 20 to output the results through the mobile phone 40, the mobile phone 40 and supply power It consists of a mobile phone mounting portion 30 to.

In this case, the GPS receiver 10, the navigation unit 20, and the mobile phone mounting unit 30 are formed in a hands-free type mounted on a vehicle and are separated from the mobile phone 40.

The operation of the navigation system using a general mobile phone made as described above will be described with reference to a flowchart for describing a method of operating a navigation system using a conventional mobile phone illustrated in FIG. 2.

First, the operation program is downloaded from the service center 60 through the wireless communication network 50 using the mobile phone 40, and then the current location information is obtained through the GPS receiver 10 and then registered in the service center 60 ( S201).

Then enter the destination he wants to go (S202). Then, the service center 60 calculates the optimal route together with the traffic information analyzed in real time according to the current vehicle location and the input destination (S203).

Then, the analyzed data is transmitted through the mobile phone 40 (S205).

Then, the navigation unit 20 performs the road guidance through the mobile phone according to the driving state of the vehicle through the data transmitted through the mobile phone 40 and the direction sensor 22 and the acceleration sensor 24 therein (S206).

In order to provide traffic information and road guidance services, traffic information can be provided only when the traffic situation is identified and databased in the service center in real time. Acquisition by using Closed Circuit Television (CCTV) on the main road, collecting by traffic operator, collecting by loop detector on the road, collecting by beacon, etc. I purchase and service a piece of information.

As such, a huge budget is required to operate a vehicle for collecting traffic information in order to obtain traffic information or to purchase it from an information provider. This difficulty is difficult to reflect the rapidly changing traffic information in real time, there is a problem that does not meet the needs of customers.

Accordingly, the present invention is to solve the conventional problem, the valid sample set by using the record of the call on the road of the caller (CDR: Call Data Record) of the caller, and using the extracted valid sample road traffic speed To calculate the traffic information.

The present invention for achieving the above object is a first step of receiving the call log information of the mobile terminal that terminated the call from the exchange; Extracting base station identification information included in the call log information; A third step of comparing the extracted base station identification information with stored sample base station identification information to determine whether the sample base station is in a unit section; A fourth step of selecting the mobile terminal as a sample object if all of the base stations communicated by the mobile terminal are sample base stations in a unit section; A fifth step of selecting a set number of selected sample objects as an effective sample; A sixth step of identifying call time, call start base station and call end base station from call log information of each valid sample; And
And a seventh step of calculating an average hourly speed using the inter-base station distance information and the talk time extracted from a predetermined database storing inter-base station distance information.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. 3 is a block diagram schematically illustrating a system to which a traffic information generation method using call log information according to the present invention is applied.

Prior to the description, in the present invention, the road refers to a path through which a moving object such as a car or a train moves, such as a highway, a general national road, a local road, a city road, and a path in which a bicycle or a person moves.

The system to which the present invention is applied uses a conventional mobile communication network including a plurality of base stations, a plurality of exchanges and a home location register.

In more detail, the system of the present invention includes a base station (hereinafter, referred to as a "sample base station"), which is installed around a road and has one sector allocated exclusively to the road, among a plurality of base stations and exchangers constituting a general mobile communication network. It is connected to this sample base station and performs an exchange function for a mobile terminal and uses a switch (hereinafter referred to as a 'sample exchange') that generates call record information (CDR) for each mobile terminal. And the system of the present invention includes a traffic information server 110 for generating traffic information using the call record information (CDR) generated by the sample exchange.

The sample base station is set for a moving path or administratively divided road for each type of moving object. In other words, if the moving path of the moving object is a highway, the sample base station will be a base station covering the highway, and if the moving path of the moving object is a train track, the base station covering the train track will be used. If not possible, a narrow path that would allow a bicycle or person to move would be a base station covering this particular path.

By determining the sample base station as described above, the present invention enables the provision of traffic information on a specific road section for a specific moving object (train, bicycle, automobile, etc.). Furthermore, the present invention generates the traffic information using the valid sample, thereby increasing the reliability of the information.

Meanwhile, the exchanges shown in FIG. 3 are sample exchanges 131, 132, 133, and such sample exchanges 131, 132, 133 are, for example, at least one or more sample base stations 141, 142 such as exchange 132. 143, 144).

As shown in FIG. 4, the sample base stations 141 to 144 are installed on a road and communicate with a mobile terminal moving along a road through an air interface section. Ideally, the distance between each sample base station is preferably constant, and the distance between base stations is measured at the time of installation and stored in a separate DB or traffic information server 110 to be used when generating traffic information.

The sample exchangers 131-133 may be responsible for at least one or more sample base stations, and may be responsible for general base stations 145 and 146 whose coverage is off the road. The sample exchangers 131 to 133 generate a call record information (CDR) for a specific mobile terminal when the call is made through a specific base station through the base station and provides the traffic information server 110 to the traffic information server 110.

Here, in order to generate accurate traffic information, the present invention intends to use only the call log information of the mobile terminal that has been talking while driving on the road.

In order to use only the call log information of the mobile terminal that has been calling while driving on the road, it is necessary to find the mobile terminal that has been talking using only the sample base station. Although the present invention uses only the call log information from the sample exchange in charge of the sample base station, the sample exchange also provides call log information of the mobile terminal which is called from the general base station.

Therefore, the traffic information server 110 has an extraction function of extracting only the call record information (CDR) corresponding to the sample base station among the call record information (CDR) provided by the sample exchanger (131 to 133). At this time, the traffic information server 110 performs the extraction function using the call log information, the call record information (CDR), the identification information of the mobile terminal, the call start time, the call end time, the originating device station or the receiving base station, the call completion Base station information is included.

Call log information including the outgoing base station information is referred to as "outgoing call log information", and call log information including the incoming base station information is referred to as "incoming call log information". When the mobile terminal makes a call, the exchange generates outgoing call record information. When the mobile terminal makes a call, the exchange generates incoming call record information.

The present invention divides the entire road section into a plurality of unit sections in order to generate more accurate traffic information, and uses only the call log information of the mobile terminal in which the call is made only in the unit section.

The present invention divides the entire road section into a plurality of unit sections, and then sets a sample priority for each base station. Here, it is preferable to set the unit section to include two or three base stations, but in some cases, the unit section may be set to more base stations.

Setting the sample priority for the base station is because the number of samples to be extracted is uniform (or large) or not according to the geographic and environmental effects of each base station. For example, in base stations such as rest areas, toll gates, interchanges, mountain areas, and tunnels, the number of samples to be extracted is not uniform or small due to conditions such as normal driving conditions or poor reception sensitivity.

The present invention sets the sample priority high for base stations with uniform (or many) samples to be extracted, and sets the sample priority low toward base stations with low uniformity. Sample priority information of the base stations for each unit section is stored in the traffic information server 110 or stored in a separate DB.

The traffic information server 110 generates traffic information every 5 minutes with respect to the call log information received from the sample exchangers 131 to 133, extracts about three sample objects in a unit section, The distance between base stations according to the movement route is divided by the movement time (ie, talk time) to calculate the movement speed of the specific sample, that is, the average speed.

Hereinafter, an effective sampling selection process essential for accurate traffic information generation will be described with reference to FIG. 5. 5 is a flowchart illustrating a valid sample selection process using call log information according to an embodiment of the present invention.

Traffic information server 110 receives the outgoing call record information (CDR) or the incoming call record information (CDR) from the sample exchange (131 to 133) (S501), when the traffic information generation cycle time to select a valid sample Each call record information (CDR) received during the traffic information generation cycle time is analyzed (S502).

The traffic information server 110 checks the originating base station information field and the call termination base station information field in the outgoing call recording information (CDR) when analyzing the call log information (CDR), and the called base station in the incoming call record information (CDR). Check the information field and the call termination base station information field.

The checking of the originating (or incoming) base station information field and the call terminating base station information field is for confirming whether the mobile terminal has been driving on the road.

By checking each of the base station fields, the traffic information server 110 determines whether the mobile terminal is the source base station or the destination base station is the sample base station and the call termination base station is the sample base station in the unit section (S503 to S505). The determination (S503 to S505) is made by comparing the identification information of the stored base station for each unit section and the identification information of each base station included in the call record information (CDR).

In the determinations (S503 to S505), if the originating (or called) base station and the call terminating base station are the sample base stations in the unit section, the traffic information server 110 determines that the sample has a high probability of traveling on the highway, and thus provides call record information (CDR). ) Identify the identification information of the mobile terminal included in the) and select the identified mobile terminal as a sample target (S506).

Here, in the present invention, even if the originating (or called) base station and the call terminating base station are the sample base station, if the originating (or incoming) base station and the call terminating base station are the same, the subject may be excluded from the sample object. In the above determinations (S503 to S505), if one of the base station (or originating base station) and the call terminating base station of the call record information (CDR) is not the sample base station, the traffic information server 110 selects the call record information from the sample object selection. Exclude.

When the traffic information server 110 selects a specific mobile terminal as a sample object, the traffic information server 110 compares the set source (or incoming) base station and the call termination base station with sample priority information for each base station to determine a sample priority (S507). ).

Through the step S507, the sample subjects are ranked according to the sample priority, and the traffic information server 110 selects as many valid samples from the determined ranks in order of the highest sample priority (S508).

Hereinafter, a traffic information generation method using call log information according to an embodiment of the present invention will be described with reference to FIG. 6. 6 is a flowchart illustrating a process of generating traffic information using a valid sample according to an embodiment of the present invention.

As described above, when a predetermined number of valid samples are selected using the call log information (CDR) (S601), the traffic information server 110 sends (or receives) from the call log information (CDR) of one valid sample. After the base station and the call termination base station are identified, the distance between the originating (or incoming) base station and the call termination base station is determined using the stored distance information between the base stations (S602).

The traffic information server 110 checks the call time recorded in the call record information (CDR) (S603), and then divides the call time by the distance between base stations determined in S602 to calculate an average hourly speed corresponding to the valid sample (S604). ).

When the average hourly speed is calculated for one valid sample, the traffic information server 110 performs the steps S602 to S603 for each of the remaining valid samples to calculate the average hourly speed for each valid sample (S605). Then, after adding the average speeds for each valid sample, the result is divided by the number of valid samples to finally determine the average speed of the vehicle (S606).

Here, as described above, if the valid sample is a valid sample considering the valid sample interval, that is, a valid sample in which the originating (or called) base station and the call terminating base station are located in a specific valid sample interval, the average speed of the moving object obtained in step S606 is the corresponding valid sample. Traffic information in the sample interval.

The technical spirit of the present invention has been described above with reference to the accompanying drawings, but this is by way of example only and not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

The present invention has the effect of obtaining a traffic situation on the road in real time by selecting a valid sample of reliability using the call log information of the mobile terminal that is called on the road and generating traffic information using the selected valid sample.

In addition, the present invention can not only reduce the huge budget consumption for operating a separate traffic collection vehicle or purchase traffic information from an information provider by using a mobile communication network already secured to obtain traffic information, but also for continuous measurement. By reflecting the rapidly changing traffic information in real time, there is an effect that can meet the needs of customers.

Claims (10)

A first step of receiving call log information of the mobile terminal which terminated the call from the exchange; Extracting base station identification information included in the call log information; A third step of comparing the extracted base station identification information with stored sample base station identification information to determine whether the sample base station is in a unit section; A fourth step of selecting the mobile terminal as a sample object if all of the base stations communicated by the mobile terminal are sample base stations in a unit section; A fifth step of selecting a set number of selected sample objects as an effective sample; A sixth step of identifying call time, call start base station and call end base station from call log information of each valid sample; And And a seventh step of calculating an average hourly speed using the inter-base station distance information and the talk time extracted from a predetermined database storing inter-base station distance information. In the traffic information generation method using the call log information of the mobile terminal moving along the highway, A first step of receiving call log information of the mobile terminal which terminated the call from an exchange; Extracting base station identification information included in the call log information; A third step of comparing the extracted base station identification information with sample base station identification information covering the highway to determine whether the sample base station is within a unit section; A fourth step of selecting the mobile terminal as a sample object if all of the base stations communicated by the mobile terminal are sample base stations in a unit section; A fifth step of selecting a set number of selected sample objects as an effective sample; A sixth step of identifying call time, call start base station and call end base station from call log information of each valid sample; And And a seventh step of calculating an average hourly speed using the inter-base station distance information and the talk time extracted from a predetermined database storing inter-base station distance information. The method according to claim 1 or 2, The base station identification information extracted in the second step is the base station identification information that the mobile terminal initiated the call and the base station identification information that the mobile terminal terminated the call. The method according to claim 1 or 2, In the fifth step, traffic information using call log information may be determined by determining sample priorities for each of the selected sample targets, and selecting as many effective samples as the set number of samples in order of high sample priority. How to produce. The method of claim 4, wherein The sample priority is traffic information generation method using call log information, characterized in that the sample priority for the base stations of the same unit interval. The method of claim 5, The fifth step is a traffic information generation method using the call log information, characterized in that for selecting three effective samples for each unit section. The method of claim 1, And the sample base station is a base station installed on a moving path of a moving object. The method according to claim 1 or 2, The second to sixth steps are traffic information generating method using call log information, characterized in that is performed every set traffic information generation cycle. In a server connected to a mobile communication network, A first step of receiving call log information of the mobile terminal which terminated the call from the exchange; Extracting base station identification information included in the call log information; A third step of comparing the extracted base station identification information with stored sample base station identification information to determine whether the sample base station is in a unit section; A fourth step of selecting the mobile terminal as a sample object if all of the base stations communicated by the mobile terminal are sample base stations in a unit section; A fifth step of selecting a set number of selected sample objects as an effective sample; A sixth step of identifying call time, call start base station and call end base station from call log information of each valid sample; And A computer-readable recording medium having a program recorded thereon for executing a seventh step of calculating an average hourly speed using the distance between base stations and the talk time extracted from a predetermined database storing distance information between base stations. In a server connected to a mobile communication network, A first step of receiving call log information of the mobile terminal which terminated the call from an exchange; Extracting base station identification information included in the call log information; A third step of comparing the extracted base station identification information with sample base station identification information covering the highway to determine whether the sample base station is within a unit section; A fourth step of selecting the mobile terminal as a sample object if all of the base stations communicated by the mobile terminal are sample base stations in a unit section; A fifth step of selecting a set number of selected sample objects as an effective sample; A sixth step of identifying call time, call start base station and call end base station from call log information of each valid sample; And A computer-readable recording medium having a program recorded thereon for executing a seventh step of calculating an average hourly speed using the distance between base stations and the talk time extracted from a predetermined database storing distance information between base stations.

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