KR102504300B1 - method for traffic information processing based on congestion information in IP-based traffic information service - Google Patents

Abstract

In order to improve economy, the present invention includes a first step of extracting a node link ID and a road type from a navigation terminal and transmitting the extracted node link ID and road type to a traffic information backend server, and generating a default node link ID list by the traffic information backend server; The navigation terminal requests traffic information of a range in which the navigation terminal is located from the traffic information backend server at a predetermined cycle, and the traffic information backend server receives a road type list and longitude and latitude information that are smoothly displayed from the navigation terminal. Step 2; a third step of converting, by the traffic information backend server, the section average speed into congestion types mutually segmented for each preset speed section according to the preset speed limit of the node link ID; and when the traffic information back-end server transmits congestion traffic information including the congestion type to the navigation terminal, but the data for the section average speed and the previous transmission value and the current transmission value for the congestion type are different from each other, congestion traffic Provided is a traffic information processing method based on congestion information in an IP-based traffic information service including a fourth step of selectively generating an information cancellation message.

Description

Method for traffic information processing based on congestion information in IP-based traffic information service

The present invention relates to a traffic information processing method based on congestion information in an IP-based traffic information service, and more particularly, for CTT traffic information composed of a large number of packets, navigation with a wider coverage while reducing transmission data Congestion information-based traffic information processing in an IP-based traffic information service that improves economic feasibility by reducing resource usage by enabling the use of CTT traffic information congestion types and reducing excessive network traffic to reduce costs such as server expansion It's about how.

In general, a navigation system applied with an IP-based traffic information service, one of the connected car services, requests traffic information from a backend server every 2 minutes, CTT traffic information is transmitted and received through the network in units of coverage.

Here, CTT (Congestion and Travel-Time Information) means 'congestion traffic information' defined by the Traffic Protocol Experts Group (TPEG), and defines the Average Link Speed and Congestion Type. there is. For example, the data size of the provided CTT traffic information varies depending on the coverage, but about 70,000 CTTs in Seoul and Gyeonggi have a size of about 3MB.

In addition, in the case of the existing DMB-based traffic information service, since traffic information is transmitted in a broadcasting method, bandwidth is not affected even if the number of received navigations increases.

However, in the IP-based traffic information service, traffic information is directly provided after the navigation system accesses the traffic information server through the IP network. Therefore, if multiple navigation devices access the backend server at the same time, CTT traffic information reception is delayed due to bandwidth degradation. There was a problem with this.

Here, in order to offset the delay in receiving traffic information, a method of lowering the CTT coverage within a certain range from the location of a terminal equipped with a navigation system or simply providing only congestion information is being considered.

However, when the CTT coverage is lowered, when a long-distance destination is searched for, there is a problem in that the quality of route calculation is deteriorated because traffic information is not provided at a location out of the CTT coverage.

In addition, when only congestion information is simply provided, it is impossible to distinguish between traffic volume in a smooth state and no information, and thus inaccurate information is provided to a user using a navigation system.

Accordingly, the conventional IP-based traffic information provides congestion information and smoothness information together, but takes temporary measures to limit coverage. There was a serious problem in that the cost increase occurred.

Korean Patent Registration No. 10-1350247

In order to solve the above problems, the present invention reduces transmission data for CTT traffic information composed of a large number of packets, while enabling navigation to use the congestion type of CTT traffic information with wider coverage, thereby reducing the amount of resource usage. In addition to reducing excessive network traffic, the task is to provide a traffic information processing method based on congestion information in an IP-based traffic information service that improves economic feasibility by reducing costs such as server expansion.

In order to solve the above problems, the present invention extracts a node link ID and road type, which are a unified ID system for a traffic network, from a navigation terminal and transmits them to a traffic information backend server, and the traffic information backend server extracts the extracted node link A first step of generating a default node link ID list for IDs; The navigation device requests traffic information of the range of the area in which the navigation device is located from the traffic information backend server at a preset cycle, and the traffic information backend server provides a list of road types smoothly displayed from the navigation device and longitude and latitude from the navigation device A second step of receiving information; The traffic information backend server calculates the section average speed based on the data collected about the section average speed for each node link ID centered on the longitude and latitude of the area where the navigation terminal is located, according to the preset limit speed of the node link ID. A third step of converting into a congestion type including smooth, slow, delayed, and congested traffic partitioned by set speed section; and the traffic information back-end server transmits congestion traffic information including the congestion type to the navigation terminal, but transfers data on the section average speed and the congestion type to prevent redundant transmission of congestion traffic information at each repetition period. A fourth step of selectively generating a congestion traffic information cancellation message for deleting data on the congestion traffic information pre-stored in a shared memory included in the navigation terminal when the transmission value and the current transmission value are different from each other. Provides traffic information processing method based on congestion information in IP-based traffic information service.

Through the above solution, the present invention provides the following effects.

First, when the traffic information back-end server transmits congestion traffic information to a navigation device, it selectively generates a congestion traffic information cancellation message to prevent duplicate transmission of congestion traffic information at each repetition period, so even if the IP-based navigation service surges, traffic generation can be prevented. By minimizing it, service operation costs can be significantly reduced.

Second, the traffic information backend server creates a congestion traffic information cancellation message when the congestion type is smooth and the default node link ID list and the node link ID of the navigation device match, providing wider coverage of congestion types and delaying service provision. This can be prevented and the information quality can be remarkably improved.

Third, when a congestion traffic information cancellation message is received from the navigation terminal, the previously stored congestion traffic information data is deleted, but if not received, the congestion traffic information data is updated to prevent redundant transmission, thereby reducing resource usage while providing congestion information and smooth information. Together, it can provide accurate congestion traffic information.

1 is a block diagram showing a traffic information processing system according to a traffic information processing method based on congestion information in an IP-based traffic information service according to an embodiment of the present invention.
2 is a flowchart illustrating a traffic information processing method based on congestion information in an IP-based traffic information service according to an embodiment of the present invention.
3 is a flowchart illustrating a process of generating a default node link ID list for transmission of congestion traffic information in relation to a traffic information processing method based on congestion information in an IP-based traffic information service according to an embodiment of the present invention.
4 is a flowchart illustrating a configuration process of setting a traffic information backend server for a navigation device to process congestion traffic information for a congestion information-based traffic information processing method in an IP-based traffic information service according to an embodiment of the present invention.
5 is a flowchart illustrating a process in which a navigation device requests congestion traffic information from a traffic information backend server for a congestion information-based traffic information processing method in an IP-based traffic information service according to an embodiment of the present invention.
6 is a flowchart illustrating a process of transmitting congestion traffic information for a congestion information-based traffic information processing method in an IP-based traffic information service according to an embodiment of the present invention.
7 is a flowchart illustrating a process of processing congestion traffic information received by a navigation device in a traffic information processing method based on congestion information in an IP-based traffic information service according to an embodiment of the present invention.
8 is a flowchart illustrating a process of using congestion traffic information received by a navigation device for a traffic information processing method based on congestion information in an IP-based traffic information service according to an embodiment of the present invention.

Hereinafter, a traffic information processing method based on congestion information in an IP-based traffic information service according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a traffic information processing system according to a traffic information processing method based on congestion information in an IP-based traffic information service according to an embodiment of the present invention, and FIG. 2 is an IP address according to an embodiment of the present invention. Figure 3 is a flow chart showing a traffic information processing method based on congestion information in an IP-based traffic information service according to an embodiment of the present invention. 4 is a flow chart showing a process of generating a default node link ID list for transmission, and FIG. 4 is a traffic information processing method based on congestion information in an IP-based traffic information service according to an embodiment of the present invention. Congestion traffic information navigation 5 is a flow chart showing the configuration process of setting the traffic information backend server for processing by the terminal, and FIG. 5 is a traffic information processing method based on congestion information in an IP-based traffic information service according to an embodiment of the present invention 6 is a flowchart showing a process of requesting congestion traffic information from an information backend server, and FIG. 6 shows a process of transmitting congestion traffic information for a congestion information-based traffic information processing method in an IP-based traffic information service according to an embodiment of the present invention. FIG. 7 is a flow chart showing a process for processing congestion traffic information received by a navigation device in a congestion information-based traffic information processing method in an IP-based traffic information service according to an embodiment of the present invention. 8 is a flowchart illustrating a process of using congestion traffic information received by a navigation device for a traffic information processing method based on congestion information in an IP-based traffic information service according to an embodiment of the present invention.

As shown in FIGS. 1 to 8 , in an IP-based traffic information service according to an embodiment of the present invention, in the congestion information-based traffic information processing method, the navigation terminal extracts the node link ID and road type, and the traffic information back-end server and generating a default node link ID list for the extracted node link ID by the traffic information backend server (s10), and the navigation terminal transmits traffic information of the area where the navigation terminal is located to the traffic information backend server at a preset cycle. request, and the traffic information backend server receives the list of road types displayed smoothly from the navigation terminal and the longitude and latitude information from the navigation terminal (s20), and the traffic information backend server obtains a node link ID based on the longitude and latitude of the area where the navigation terminal is located Collecting data on the average speed of each section and converting the average speed of the section into a congestion type including smooth, slow, delayed, and congested according to the preset speed limit of the node link ID based on the collected data (s30) And, the traffic information backend server transmits congestion traffic information including the congestion type to the navigation terminal, but selectively generates a congestion traffic information cancellation message to prevent redundant transmission of congestion traffic information of the same type at each repetition period (s40) includes

In addition, the traffic information processing system 100 according to the congestion information-based traffic information processing method in the IP-based traffic information service according to an embodiment of the present invention includes a traffic information backend server 10 and a navigation terminal 20 do.

At this time, the traffic information back-end server 10 performs wireless communication with the arithmetic unit 11 provided for calculation processing, the database storage unit 12 for storing databases, and each navigation terminal 20 provided in plurality. It may include a communication unit 13 provided for. In addition, the navigation terminal 20 may include hardware including a shared memory that wirelessly communicates with the communication unit 13 and performs a storage function, software for processing calculations, and a display on which traffic information is output.

Meanwhile, Node Link ID, which will be described later, means an ID system uniformly applied to the national transportation network for smooth exchange of traffic information by the Ministry of Land, Infrastructure and Transport.

In addition, congestion traffic information means CTT (Congestion and Travel-Time Information), and congestion traffic information includes Average Link Speed and Congestion Type defined by the Transport Protocol Experts Group (TPEG). do.

In addition, the congestion type means a level of speed (LOS), and is classified into 'smooth', 'slow', 'delayed', and 'congested' in the congestion traffic information. At this time, free flow means that there is no congestion section.

And, the section average speed (Average Link Speed) means the average speed at which the vehicle passes through the link on the road defined by the node link ID.

In addition, it is preferable to understand that the congestion traffic information cancellation message is a means for deleting traffic information that is no longer valid among CTT information that has already been transmitted and stored in a navigation system according to specifications defined in the congestion traffic information.

And, the road type means the type of road defined by the MAP original road manufacturer, and the road type can generally be defined as expressways, urban expressways, toll roads, express national roads, and general national roads.

In addition, the default node link ID list means a list of node link IDs that do not need to provide traffic information to navigation when the congestion level is smooth, and each node link ID provided by the navigation terminal company Based on the road type table, the traffic information provider can configure it directly.

On the other hand, referring to FIGS. 1 to 8, the navigation terminal 20 identifies a node link ID, which is a unified ID system for the national transportation network, and road types including expressways, urban expressways, toll roads, national expressways, and general national roads. The extracted data is transmitted to the traffic information backend server 10, and the traffic information backend server 10 creates a default node link ID list for the extracted node link ID (s10).

Here, the Ministry of Land, Infrastructure and Transport applies a unified node link ID system to the national transportation network for smooth exchange of traffic information. Accordingly, the node link ID defined by the Ministry of Land, Infrastructure and Transport is included as a property of each road in the map data of the navigation terminal 20 . Accordingly, the traffic information backend server 10 may provide congestion traffic information (CTT) to the navigation terminal 20 based on the node link ID.

At this time, the information affecting navigation route calculation and search in the navigation terminal 20 is congestion traffic information. Since most of such congestion traffic information is temporarily generated at a specific time or by the occurrence of a specific event, it is desirable to understand that most of the congestion during the day is maintained in a free flow state.

Here, the present invention provides traffic information based on congestion traffic information to the navigation terminal 20, and when the navigation terminal 20 connects to the traffic information backend server 10, the traffic information backend server Among configuration settings provided by (10), the navigation terminal 20 may be configured to directly display smoothness on a map screen according to a list of road types.

To this end, referring to FIG. 3, the process of generating a default node link ID is described. After a navigation terminal extracts matching information between a node link ID and a road type from map data, it should be provided to a traffic information provider, and the traffic information provider A list of default node link IDs used for traffic information backend server (10) configuration settings should be configured. At this time, the configured default node link ID list is maintained until the map database (Map DB) used in the navigation terminal 20 is changed.

Here, after extracting the road type for each node link ID (s101), constructing a road type table for each node link ID (s102), and sharing the road type table with the traffic information provider and the traffic information backend server 10 (s103 )can do. Then, the traffic information provider and the traffic information backend server 10 generate a default node link ID list that can be smoothly displayed even if there is no actual traffic information (s104).

On the other hand, the navigation terminal 20 requests the traffic information of the area range where the navigation terminal 20 is located from the traffic information backend server 10 at a predetermined period, and the traffic information backend server 10 sends the navigation terminal A list of road types smoothly displayed from and longitude and latitude information are provided from the navigation terminal (s20).

At this time, it is preferable to understand that the area range in which the navigation terminal 20 is located is an area within a predetermined range from where the navigation terminal 20 is located, and is used in the same meaning as CTT coverage. .

Here, referring to FIG. 4, the traffic information configuration setting will be described. When the navigation terminal 20 requests a connection to the traffic information backend server 10, the traffic information backend server 10 provides the navigation terminal As component settings in (20), a list of road types that should be smoothly displayed and CTT coverage providing traffic information are provided.

In other words, CTT coverage means a range in which congestion traffic information is provided centered on the longitude and latitude where the navigation terminal 20 is located, and the navigation terminal 20 is within the range of the area where the navigation terminal 20 is located, that is, CTT coverage Among the roads located within the roads, roads identical to the type of roads provided by the traffic information backend server 10 are processed as smooth by default even if congestion traffic information is not provided.

At this time, the navigation terminal 20 requests connection registration from the traffic information backend server 10 (s201), and the traffic information backend server 10 provides a list of road types that can be smoothly displayed even if there is no actual traffic information. and the range for providing traffic information are delivered to the navigation terminal 20 (s202). And, the navigation terminal 20 configures the road type list and traffic information provision range set from the traffic information backend server 10 as settings for outputting traffic information (s203).

And, referring to FIG. 5, the process of requesting traffic information is described. The navigation terminal 20 provides a predetermined period, typically every 2 minutes, within the area where the navigation terminal 20 is located, that is, within CTT coverage. Traffic information about the traffic information is requested from the traffic information backend server 10 and longitude and latitude information is provided (S301).

Subsequently, the traffic information backend server 10 provides congestion traffic information for each node link ID within the preset CTT coverage to the navigation terminal 20 based on the longitude and latitude where the navigation terminal 20 is located (s302).

On the other hand, the traffic information backend server 10 collects data on the average speed of each section by node link ID centering on the longitude and latitude of the area range where the navigation terminal 20 is located, Accordingly, the section average speed is converted into a congestion type including smooth, slow, delayed, and congested traffic partitioned by predetermined speed sections (s30).

Here, with reference to FIG. 6, a process of converting a congestion type, that is, a level of speed (LOS), based on a speed limit will be described. Here, the color of the traffic information flow displayed on the map screen on the display of the navigation terminal 20 is set based on the degree of congestion. For example, 'smooth' without congestion is displayed in green flow, 'slow' is yellow, 'lag' is orange, and 'congestion' is red.

In order to display such a flow of traffic information, the traffic information backend server 10 converts the average speed of the collected sections (Average Link Speed) into smooth and slow traffic partitioned into each preset speed section based on the speed limit of the road of the node link ID. , converts to a congestion type that includes lagging and congestion.

At this time, in some cases, the section average speed is converted by dividing it into road types, that is, expressways, urban expressways, national roads, and city and city highways. Therefore, in the present invention, the degree of congestion is calculated based on the speed limit of the road to which the node link ID is connected.

In detail, the traffic information back-end server 10 collects data on the average speed of sections for each node link ID within the previously set CTT coverage centering on the longitude and latitude of the area range where the navigation terminal 20 is located (s401).

Then, the traffic information backend server 10 converts the section average speed into a congestion type including smooth, slow, delayed, and congested traffic partitioned according to the preset speed section according to the preset speed limit of the node link ID. (s402). Next, the traffic information backend server 10 checks the traffic information value for the previously transmitted congestion type (S403).

Meanwhile, the traffic information backend server 10 transmits congestion traffic information including the congestion type to the navigation terminal 20, but cancels the congestion traffic information to prevent redundant transmission of congestion traffic information of the same type every repetition period. A message is selectively generated (s40).

Here, a process of transmitting traffic information based on congestion traffic information will be described with reference to FIG. 6 . At this time, in the present invention, even when the traffic information backend server 10 provides data based on congestion information, in order to reduce the amount of data for congestion traffic information, congestion traffic information already provided to the navigation terminal 20 is transmitted redundantly. set not to. However, since there is a slight change in the section average speed depending on the time of collection, it is necessary to consider giving a deviation for the same data or not. For example, deviations of +2 and -2 average speed can be determined as the same data.

In addition, the traffic information backend server 10 determines whether traffic information should be provided when congestion is smooth using a default node link ID list. If congestion is smooth, it is preferable to provide the navigation terminal 20 with a node link ID that does not match the default node link ID list. At this time, since the traffic information collection is not targeted at a specific road type, the present invention may allow smooth information to be provided in some cases.

In addition, when the already provided congestion traffic information is smoothly changed, a congestion traffic information cancellation message is provided to the navigation terminal 20 so that the navigation terminal 20 can smoothly determine the degree of congestion, and the finally transmitted Congestion traffic information is managed as transmitted traffic information and used to prevent duplicate data transmission when requesting the next congestion traffic information.

In detail, the traffic information backend server 10 compares and determines whether the previously transmitted value and the currently transmitted value are the same for the data on the section average speed and the congestion type (S404).

Here, the algorithm ends when the traffic information backend server 10 agrees with a previously transmitted value and a currently transmitted value for the section average speed data and the congestion type.

On the other hand, the traffic information back-end server 10 determines whether the congestion type is smooth when the previously transmitted value and the currently transmitted value are different from each other for the data on the section average speed and the congestion type (s405 ) is performed.

Meanwhile, the traffic information backend server 10 generates the congestion traffic information cancellation message when the congestion type is smooth and the default node link ID list matches the node link ID of the navigation terminal 20 .

In detail, when the traffic information backend server 10 determines that the congestion type is smooth, a step of checking whether the default node link ID exists (S406) is performed.

Then, the traffic information backend server 10 compares and determines whether the default node link ID list and the node link ID of the navigation terminal 20 match (S407).

Here, the traffic information backend server 10 generates the congestion traffic information cancellation message when the default node link ID list and the node link ID of the navigation terminal 20 match (S408). At this time, a step of the traffic information backend server 10 transmitting the congestion traffic information cancellation message to the navigation terminal 20 may be performed.

On the other hand, the traffic information backend server 10 generating congestion traffic information when the congestion type is not smooth or the default node link ID list does not match the node link ID of the navigation terminal 20. (s409) is performed.

Then, the traffic information backend server 10 transmits the traffic congestion information to the navigation terminal 20 (S410). Then, a step (s411) of storing the transmitted congestion traffic information in a shared memory included in the navigation terminal 20 may be performed.

Meanwhile, referring to FIG. 7 , a process of processing congestion traffic information based on the congestion information received by the navigation terminal 20 will be described. First, the navigation terminal 20 can update data and cancel a message when receiving congestion traffic information, and the congestion traffic information configured in this way can be used to access each software process of the navigation terminal 20. After being stored in the shared memory, a congestion traffic information update notification signal may be delivered to an internal software process of the navigation terminal 20 .

Here, when the congestion traffic information cancellation message is received by the navigation terminal 20, the navigation terminal 20 deletes data on the congestion traffic information pre-stored in the shared memory, but if not received, Data on the congestion traffic information previously stored in the memory may be updated.

In detail, when the congestion traffic information is received by the navigation terminal 20 (s501), the navigation terminal 20 checks whether the congestion traffic information cancellation message is received (s502).

In addition, when the navigation terminal 20 confirms that the congestion traffic information cancellation message is received, the navigation terminal 20 deletes data on the congestion traffic information pre-stored in the shared memory (s503 ) is performed.

On the other hand, if the navigation terminal 20 confirms that the congestion traffic information cancellation message has not been received, updating data on the congestion traffic information pre-stored in the shared memory to data on new congestion traffic information ( s504) is performed. Then, the navigation terminal 20 generates a congestion traffic information update notification signal and transmits it to the traffic information backend server 10 or the navigation user (S505).

Meanwhile, referring to FIG. 8 , a process of using congestion traffic information based on the congestion information received by the navigation terminal 20 will be described. At this time, the software of the navigation terminal 20 reads the node link ID of the corresponding road from the map database to apply the congestion traffic information, and then the congestion traffic information for each node link ID stored in the shared memory is stored in the shared memory check whether there is

If congestion traffic information exists in the shared memory, the navigation terminal 20 displays the traffic flow according to the degree of congestion of the corresponding road on the display. At this time, when congestion traffic information is not stored in the shared memory, the navigation terminal 20 determines whether the node link ID is located within the CTT coverage and whether the road type is to be displayed as smooth.

Here, the traffic information flow is displayed as smooth only when both whether the node link ID is located within the CTT coverage and whether the road type to be displayed as smooth are simultaneously satisfied. If the node link ID is not located within the CTT coverage and the road type to be displayed as smooth is not satisfied at the same time, traffic information is not displayed.

In detail, the navigation terminal 20 generates the congestion traffic information update notification signal (S601), checks the node link ID of the road for displaying traffic information (S602), and checks the node link ID traffic information (S603) The steps are performed sequentially.

Here, in order for the navigation terminal 20 to apply congestion traffic information, a step of extracting the node link ID of the road where the navigation terminal 20 is located from a map database pre-stored in the navigation terminal 20 may be performed there is. Also, a step of checking whether the congestion traffic information for each node link ID is stored in the shared memory may be performed.

Then, the navigation terminal 20 determines whether the congestion traffic information exists in the shared memory (S604). Here, if the traffic congestion information exists in the shared memory, the navigation terminal 20 displays the traffic flow corresponding to the congestion type of the road on which the navigation terminal 20 is located (S605). .

On the other hand, if the congestion traffic information does not exist in the shared memory, a step of reading the distance between the road link ID and the road type connected to the node link is performed (S606). That is, when the congestion traffic information does not exist in the shared memory, the navigation terminal 20 determines whether the node link ID is located within the range of the area where the navigation terminal 20 is located. The distance between link IDs can be extracted.

In addition, when the navigation terminal 20 is a road type to be basically displayed as smooth and a node link ID within a smooth display range, smooth is displayed on the road.

In detail, a step of determining whether the navigation terminal 20 belongs to a road type to be displayed smoothly (S607) is performed, but if it belongs to a road type to be displayed smoothly, the navigation terminal 20 displays smoothly A step of determining whether the node link ID is within the range (S608) is performed. Subsequently, when the navigation terminal 20 has a node link ID within the smooth display range, a step of displaying smooth on the road (S609) is performed.

On the other hand, if the navigation terminal 20 is not a road type that should be displayed smoothly or the node link ID is not within the smoothly displayed range, a step of not displaying traffic information on the road (S610) is performed.

As such, in the congestion information-based traffic information processing method in the IP-based traffic information service according to a preferred embodiment of the present invention, the traffic information backend server 10 sends the navigation terminal 20 a congestion information including the congestion type. Traffic information is transmitted, but a congestion traffic information cancellation message is selectively generated to prevent redundant transmission of congestion traffic information of the same type at each repetition period, so even if IP-based navigation services increase rapidly, service operation costs are minimized by minimizing network traffic. Significant savings can be made to improve economic efficiency.

In addition, the traffic information backend server 10 determines that the congestion type is smooth and that the default node If the link ID list and the node link ID of the navigation terminal 20 match, the congestion traffic information cancellation message is generated, thereby providing a congestion type with wider coverage and reducing transmission data, thereby improving information quality and economy at the same time. there is.

In addition, when the congestion traffic information cancellation message is received from the navigation terminal 20, data on the congestion traffic information pre-stored in the shared memory included in the navigation terminal 20 is deleted. Accurate congestion traffic information can be provided by providing both congestion information and smoothness information while reducing resource usage by preventing duplicate transmission by updating data on the congestion traffic information previously stored in the shared memory.

In this case, terms such as "include", "comprise" or "have" described above mean that the corresponding component may be present unless otherwise stated, excluding other components. It should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Commonly used terms, such as terms defined in a dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and unless explicitly defined in the present invention, they are not interpreted in an ideal or excessively formal meaning.

As described above, the present invention is not limited to the above-described embodiments, and it is possible to modify and implement the present invention by those skilled in the art without departing from the scope claimed in the claims of the present invention. And, such modifications fall within the scope of the present invention.

10: traffic information backend server 20: navigation terminal

Claims (10)

The navigation terminal extracts the node link ID and road type, which are a unified ID system for the traffic network, and transmits them to the traffic information backend server, and the traffic information backend server creates a default node link ID list for the extracted node link ID Step 1;
The navigation device requests traffic information of the range of the area in which the navigation device is located from the traffic information backend server at a preset cycle, and the traffic information backend server provides a list of road types smoothly displayed from the navigation device and longitude and latitude from the navigation device A second step of receiving information;
The traffic information backend server calculates the section average speed based on the data collected about the section average speed for each node link ID centered on the longitude and latitude of the area where the navigation terminal is located, according to the preset limit speed of the node link ID. A third step of converting into a congestion type including smooth, slow, delayed, and congested traffic partitioned by set speed section; and
The traffic information back-end server transmits congestion traffic information including the congestion type to the navigation terminal, but in order to prevent redundant transmission of congestion traffic information at each repetition period, data on the section average speed and previous transmission of the congestion type IP including a fourth step of selectively generating a congestion traffic information cancellation message for deleting data on the congestion traffic information pre-stored in a shared memory included in the navigation terminal when the value and the current transmission value are different from each other. Traffic information processing method based on congestion information in based traffic information service. According to claim 1,
In the fourth step,
Comparing and determining, by the traffic information backend server, whether previously transmitted values and currently transmitted values are the same for the data on the section average speed and the congestion type;
and determining, by the traffic information backend server, whether the congestion type is smooth when a previously transmitted value and a currently transmitted value for the data on the section average speed and the congestion type are different from each other. Traffic information processing method based on congestion information in based traffic information service. According to claim 2,
In the fourth step,
generating, by the traffic information backend server, the congestion traffic information cancellation message when the congestion type is smooth and the default node link ID list and the node link ID of the navigation terminal match;
and transmitting, by the traffic information backend server, the congestion traffic information cancellation message to the navigation terminal. According to claim 3,
In the fourth step,
When the congestion traffic information cancellation message is received from the navigation terminal, data on the congestion traffic information pre-stored in the shared memory included in the navigation terminal is deleted. Updating data on congestion traffic information;
A method for processing traffic information based on congestion information in an IP-based traffic information service, comprising the step of generating, by the navigation terminal, a congestion traffic information update notification signal. According to claim 4,
In the fourth step,
Extracting, by the navigation terminal, the node link ID of the road where the navigation terminal is located from a map database pre-stored in the navigation terminal to apply congestion traffic information;
and checking whether the congestion traffic information for each node link ID is stored in the shared memory. According to claim 5,
In the fourth step,
If the congestion traffic information exists in the shared memory, displaying the traffic flow corresponding to the congestion type of the road on which the navigation terminal is located is displayed on the navigation terminal. Traffic information processing method based on congestion information. According to claim 6,
In the fourth step,
When the congestion traffic information does not exist in the shared memory, IP-based traffic information comprising the step of confirming, in the navigation terminal, whether the node link ID is located within the range of the area where the navigation terminal is located Traffic information processing method based on congestion information in service. According to claim 7,
In the fourth step,
Displaying smooth on the road if the navigation terminal is a road type that should be displayed as smooth by default and a node link ID within a smooth display range;
Congestion in an IP-based traffic information service comprising the step of not displaying traffic information on a road when the navigation terminal is not a road type that should be displayed smoothly or a node link ID within a smoothly displayed range Information-based traffic information processing method. According to claim 2,
In the fourth step,
Generating, by the traffic information backend server, congestion traffic information when the congestion type is not smooth or the default node link ID list is inconsistent with the node link ID of the navigation terminal;
and transmitting, by the traffic information backend server, the congestion traffic information to the navigation terminal. According to claim 1,
In the first step, the road types include expressways, urban expressways, toll roads, expressways and national roads,
In the third step, the traffic information processing method based on congestion information in an IP-based traffic information service, characterized in that the congestion type includes smooth, slow, delayed, and congested traffic divided into predetermined speed sections.

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