JP5082823B2 - Data update system, distribution server, data update method, and data update program - Google Patents

Description

  The present invention relates to a data update system, a distribution server, a data update method, and a data update program.

The navigation system uses POI (Point Of Interest) to search for destinations
A built-in hard disk storing data and an external storage medium such as an optical disk are provided. A large number of POI data such as tens of millions of cases are stored in these storage media.

  On the other hand, information regarding each point or facility changes day by day, resulting in a deviation from the POI data stored in the navigation system. For this reason, a system for storing the latest version of POI data in the management server and updating the POI data of the navigation system has already been constructed.

  However, if all the difference data between the old version POI data and the latest version POI data is distributed to the navigation system, the amount of distribution data increases and the load on the navigation system and the network increases.

On the other hand, Patent Document 1 describes an apparatus that creates user information by selecting a plurality of genres with a high search frequency in descending order, and transmits the user information to a distribution center server.
JP 2004-2011149 A

  However, in the case of the above-described system, user information is created by selecting a genre with a high search frequency, and therefore the genre of data distributed to the navigation system may be too biased to those genres. Further, if all the update data corresponding to these genres is distributed to the navigation system, the amount of distribution data may be excessive.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a data update system, a distribution server, and a data update capable of reducing the amount of distribution data and distributing data highly necessary for the user. To provide a method and a data update program.

In order to solve the above-mentioned problems, the invention according to claim 1 is a navigation device comprising reference information storage means storing point reference information belonging to each genre, and connected to the navigation device via a network. In the data update system including a distribution server, the navigation device acquires the reference frequency of the point reference information for each genre, and determines the reference frequency of the point reference information for each genre based on the reference frequency . Update information storage means storing update information for updating the point reference information of the navigation device, comprising: frequency acquisition means; and transmission means for transmitting the reference frequency to the distribution server. , an upper limit amount acquiring means for acquiring an upper limit amount of the update information to be distributed to the navigation device, the navigate The total amount of the update information to be distributed to the Deployment apparatus allocates the planned distribution of the rate corresponding to the reference frequency for each of the genres to be equal to or less than the upper limit amount, the update to each genre based on the planned distribution quantity Distribution amount setting means for setting a distribution amount of information, and distribution for extracting the update information of the distribution amount set for each genre from the update information storage means and distributing the extracted update information to the navigation device And a means.

Whether the invention according to claim 2, in the data updating system according to claim 1, wherein the delivery quantity setting means, before each Symbol genre, there is excess or deficiency of the planned distribution quantity to the update information If there is the genre for which the scheduled delivery amount is insufficient and the genre for which the scheduled delivery amount is excessive, the delivery schedule is assigned to the genre for which the scheduled delivery amount is insufficient. The gist is that the distribution amount is set by allocating a surplus amount of the scheduled distribution amount of the genre whose amount is excessive.

According to a third aspect of the present invention, in the data update system according to the second aspect, the distribution amount setting means includes a plurality of the genres in which the planned distribution amount is insufficient, and the planned distribution amount is excessive. When there is a certain genre, the surplus amount of the scheduled distribution amount of the genre for which the planned distribution amount is excessive is set to the respective genres for which the planned distribution amount is insufficient, and the reference frequency of the respective genre . The gist is to set the distribution amount by allocating at a rate according to the above .

According to a fourth aspect of the present invention, in the data update system according to any one of the first to third aspects, the distribution server further includes registration means for registering a preset distribution condition, and the distribution The gist is to extract the update information of the distribution amount set in the genre in descending order of priority based on the distribution condition among the update information belonging to the genre.

The invention according to claim 5 updates the point reference information of the navigation device in a distribution server connected via a network to a navigation device comprising reference information storage means storing point reference information belonging to each genre. Update information storage means for storing update information for performing, upper limit amount acquisition means for acquiring an upper limit amount of the update information to be distributed to the navigation device, and from the navigation device, the point reference information for each genre Frequency receiving means for acquiring the reference frequency of the point reference information for each genre determined based on the reference count, and for each genre so that the total amount of the update information distributed to the navigation device is equal to or less than the upper limit amount. allocate planned distribution of the percentage corresponding to the reference frequency, the based on the planned distribution amount each di Distribution amount setting means for setting a distribution amount of the update information for a channel, and the update information of the distribution amount for each genre is extracted from the update information storage means, and the extracted update information is distributed to the navigation device The gist of the present invention is to provide a distribution means for performing the above.

The invention according to claim 6 is a navigation device comprising reference information storage means storing point reference information belonging to each genre, and connected to the navigation device via a network for updating the point reference information In a data update method for updating the point reference information using a distribution server having update information storage means storing update information, the navigation device obtains the reference number of the point reference information for each genre. And determining the reference frequency of the point reference information for each genre based on the reference count, transmitting the reference frequency to the distribution server, and the distribution server distributing the upper limit amount of the update information distributed to the navigation device acquires, said di as the total amount of the update information to be distributed to the navigation apparatus becomes less than the upper limit amount Allocate planned distribution of the percentage corresponding to the reference frequency for each Nru, the based on the planned distribution quantity to set the delivery amount of the update information for each genre, the update information of the distribution amount the each genre Is extracted from the update information storage means, and the extracted update information is distributed to the navigation device.

The invention according to claim 7 is a control unit connected via a network to a navigation device including a reference information storage unit storing point reference information belonging to each genre, and an update for updating the point reference information In a data update program that updates the point reference information using an update information storage unit that stores information, an upper limit amount acquisition unit that acquires an upper limit amount of the update information to be distributed to the navigation device in the control unit A frequency receiving means for acquiring a reference frequency of the point reference information for each genre determined based on the number of times of reference to the point reference information for each genre from the navigation device, and the update to be distributed to the navigation device A distribution schedule corresponding to the reference frequency for each genre so that the total amount of information is less than or equal to the upper limit amount. Allocate the amount, extraction and distribution rate setting means for setting the delivery quantity of the update information for each genre based on the planned distribution quantity, the update information of the distribution amount the each genre from the update information storage unit Then, the gist is to cause the extracted update information to function as a distribution unit that distributes the update information to the navigation device.

According to the first aspect of the present invention, the data update system allocates a scheduled delivery amount to each genre based on the navigation device that transmits the reference frequency for each genre, the upper limit amount of the update information, and the reference frequency for each genre. And a distribution server for setting the distribution amount based on the scheduled distribution amount. For this reason, the amount of distribution data can be reduced, and update data that is highly necessary for the user can be distributed.

  According to the second aspect of the present invention, when there is a genre whose distribution amount is insufficient and a genre whose distribution amount is excessive, the distribution amount is distributed among the genres. It is possible to distribute update data that is highly necessary for the user with a sufficient distribution amount.

  According to the third aspect of the present invention, when there are a plurality of genres for which the scheduled distribution amount is insufficient, the surplus amount is allocated based on the reference frequency of those genres, so that update data that is highly necessary for the user Can be delivered.

  According to the fourth aspect of the present invention, since update information belonging to a genre is selected in descending order of priority based on distribution conditions, it can be distributed from update data that is highly necessary for the user.

According to the invention described in claim 5, the distribution server allocates a distribution amount to each genre based on the upper limit amount of the update information transmitted from the navigation device and the reference frequency for each genre, and based on the distribution amount. to set the delivery amount of Te. For this reason, the amount of distribution data can be reduced, and update data that is highly necessary for the user can be distributed.

According to the method of claim 6, the distribution server allocates a distribution amount to each genre based on the upper limit amount of the update information transmitted from the navigation device and the reference frequency for each genre, and based on the distribution amount. to set the delivery amount of Te. For this reason, the amount of distribution data can be reduced, and update data that is highly necessary for the user can be distributed.

According to the seventh aspect of the present invention, according to the data update program, the distribution amount is allocated to each genre based on the upper limit amount of the update information transmitted from the navigation device and the reference frequency for each genre, and the distribution amount is set as the distribution amount. Set the delivery amount based on . For this reason, the amount of distribution data can be reduced, and update data that is highly necessary for the user can be distributed.

  Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. FIG. 1 is a conceptual diagram of the data update system 1. The data update system 1 includes a distribution server 2 and a navigation device 10 (see FIG. 3) mounted on the vehicle C. The navigation device 10 is connected to the distribution server 2 via a network N including the base station N1 and the like.

As shown in FIG. 2, the distribution server 2 includes a CPU 3, a RAM 4, a ROM 5, a communication I / F 6,
A distribution data storage unit 7 as update information storage means and a registration data storage unit 9 as registration means are provided. The CPU 3 manages each process according to a data update program stored in the ROM 5 or other storage unit using the RAM 4 as a work area. The CPU 3 corresponds to an upper limit amount acquisition unit, a distribution amount setting unit, a distribution unit, a frequency receiving unit, and a control unit.

The distribution data storage unit 7 stores POI data 8. The POI data 8 is data for the user to refer to information regarding a facility or a specific point, and is composed of POI unit data 8A (see FIG. 7) indicating information for each facility or point. In the updated POI data 8, data related to the newly established facility is added, unnecessary data is deleted, and information related to the facility is corrected as necessary.

  The registration data storage unit 9 stores registration data 9A and distribution history data 9B for each registered user. The registration data 9 </ b> A has a user ID of the registered user and a distribution condition indicating a priority for determining data to be distributed preferentially to the navigation device 10. The distribution conditions may be set by the distribution server 2 or specified by a registered user. For example, this distribution condition stores information such as a location close to home. In the distribution history data 9B, identification data indicating the POI unit data 8A already transmitted to the registered user is stored.

  As shown in FIG. 3, the navigation device 10 includes a CPU 11, a RAM 12, a ROM 13, and a communication unit 14 as frequency acquisition means and transmission means. The CPU 11 transmits and receives various data via the distribution server 2 and the communication unit 14. Further, the CPU 11 inputs a position detection signal indicating coordinates such as latitude and longitude from the GPS receiver 15 and calculates an absolute position by radio wave navigation. Further, the CPU 11 inputs a vehicle speed pulse indicating the rotation speed of the wheel and an angular velocity from the vehicle speed sensor 16 and the gyro 17, respectively, calculates the relative position of the vehicle, and specifies the current position of the vehicle C in combination with the absolute position. .

The navigation device 10 also includes a geographic data storage unit 20 composed of an internal hard disk or an external storage medium, and a POI data storage unit 23 as reference information storage means.
The geographic data storage unit 20 stores route data 21 and map drawing data 22. The route data 21 is data for performing a route search to the destination. The map drawing data 22 has data for displaying a map screen. The image processor 24 of the navigation device 10 displays the map screen 30a on the touch panel display (hereinafter simply referred to as the display 30) using the map drawing data 22.

  The POI data storage unit 23 stores POI data 25 as point reference information. FIG. 4 is a schematic diagram showing the data structure of the POI data 25 for each point. The POI data 25 includes an area code 25A, a genre 25B, a name 25C, coordinates 25D, a link ID 25E, an address 25F, a telephone number 25G, and the like. The area code 25A is an identifier of the area to which the point belongs. The genre 25B indicates the genre to which the facility at the point belongs, or the genre to which the point belongs. The genre for classifying the POI data 25 is classified from a large category such as “play” to a middle category such as “sport facility”, and depending on the genre, it is hierarchized to a category such as “golf course”. Stores data indicating the lower genre from the data of the broadly classified genre.

  The name 25C is the name of a point or a facility. The coordinate 25D is position data such as the latitude and longitude of the point, and the link ID 25E is the number of the link with which the point is in contact or the closest link. The address 25F and the telephone number 25G are the address of the point and the telephone number of the facility. It should be noted that the POI data 25 stored in the navigation device 10 and the POI data 8 stored in the distribution server 2 are not necessarily in the same configuration, and the data formats are not necessarily the same. That is, the POI data 8 received from the distribution server 2 may be converted by the navigation device 10 and stored as the POI data 25.

When setting a destination with reference to this POI data 25, the user selects a genre on a search menu screen (not shown) displayed on the display 30, or selects a desired facility according to conditions such as a telephone number and an address. Search for. When the touch panel operation is performed, the touch panel controller 31 detects the contact position of the user's finger and outputs it to the input / output I / F 27 of the navigation device 10. The CPU 11 determines a condition designated by the user based on the contact position, extracts the corresponding POI data 25 based on the condition, and displays it on the display 30 as a list. When the destination is determined by a user operation or the like, the CPU 11 acquires the coordinates 25D of the destination from the POI data 25, temporarily stores them in the RAM 12, and uses the route data 21 to route to the destination. Explore. Further, the navigation device 10 stores data related to a registration point preset by the user, and can also set the registration point as a destination.

  The navigation device 10 also includes a history data storage unit 28. The history data storage unit 28 stores a user ID 26 and history data 29. The user ID 26 is an ID of a registered user who uses the navigation device 10. In the history data 29, the number of times set as the destination within a predetermined period is stored for each genre. For example, when a facility corresponding to the genre of “food restaurant” is set as a destination 10 times, a counter value “10” is stored in association with “food restaurant”. Further, every time a destination is newly set, the CPU 11 adds “1” to the counter value of the genre corresponding to the destination.

  Further, when receiving a distribution request from the distribution server 2, the CPU 11 calculates a reference ratio as a reference frequency based on the history data 29. This reference ratio is a ratio obtained by weighting a genre estimated to be highly necessary for the user. The weighting genre may be a large classification, a medium classification, or a small classification. In response to the distribution request, the CPU 11 transmits the reference ratio and the user ID 26 to the distribution server 2.

When the CPU 3 of the distribution server 2 receives the reference ratio and the user ID 26 from the navigation device 10, the POI unit data 8A that is not distributed to the navigation device 10 of the registered user among the POI data 8 based on the distribution history data 9B. Are extracted as difference data. The extracted data is update information for updating the POI data 25 of the navigation device 10. Further, based on the upper limit number of data as the upper limit amount and the reference ratio, the number of distributions as the distribution amount to be distributed to the navigation apparatus 10 is determined, and the POI unit data 8A of the distribution number is distributed to the navigation apparatus 10. The upper limit number of data is the upper limit value of the number of the POI unit data 8A distributed to the navigation device 10, and is set to such an extent that the load on the navigation device 10 does not adversely affect other processing such as the route search function. Yes. Further, the upper limit number of data may be determined uniformly for each user, or may be different for each user.
(Processing procedure)
Next, the processing procedure of this embodiment is demonstrated according to FIGS. FIG. 5 is a flowchart showing a procedure of history acquisition processing performed by the navigation device 10, and FIG. 6 is a flowchart showing a procedure of distribution processing of the distribution server 2.

  As shown in FIG. 5, when the system is activated, the navigation apparatus 10 waits for destination setting by a user's touch panel operation or the like (step S <b> 1-1). When the destination is set (YES in step S1-1), the genre of the set destination is acquired (step S1-2). Further, “1” is added to the counter value of the corresponding genre stored in the history data 29 stored in the history data storage unit 28 and incremented (step S1-3). Then, while the system is activated, the above processing is repeated and the history data 29 is updated.

As shown in FIG. 6, the distribution server 2 determines whether or not to start distribution (step S2-1). The delivery start timing is not particularly limited. For example, the navigation device 1
It may be determined that distribution is performed when a predetermined period has elapsed since the last update of 0, or it may be determined that distribution is performed when a new version of POI data 8 is added to the distribution data storage unit 7. good. If it is not time to start distribution (step S2-1), step S2-1 is repeated.

  When it is determined that distribution is to be started (YES in step S2-1), the CPU 3 of the distribution server 2 acquires a reference ratio from the navigation device 10 to be distributed (step S2-2). At this time, the distribution server 2 transmits a distribution request to the navigation device 10, and the navigation device 10 transmits the reference ratio and the user ID 26 based on the history data 29 in response to the distribution request.

  When the distribution server 2 acquires the reference ratio and the user ID 26, the distribution server 2 distributes it to the registered user's navigation device 10 as described above based on the reference ratio and the user ID 26 and the distribution history data 9B associated with the user ID 26. Difference data is extracted (step S2-3). At this time, in addition to newly established facilities, POI unit data 8A relating to facilities in which information about facilities has changed or lost facilities is extracted.

  Further, the CPU 3 of the distribution server 2 reads the registration data 9A from the registration data storage unit 9 and acquires the distribution conditions (step S2-4). The CPU 3 rearranges the difference data based on the distribution conditions (step S2-5). That is, as the difference data, when the POI unit data 8A for 11 facilities of “Eating and drinking facilities A to Eating and drinking facilities K” included in the genre of “Eating and drinking facilities” is extracted, as schematically shown in FIG. These POI unit data 8A are rearranged based on the distribution conditions. For example, when the distribution condition is “a point close to the user's home”, the distribution conditions are rearranged based on the coordinates of “the eating and drinking facility A to the eating and drinking facility K”.

  When rearrangement is performed, the CPU 3 acquires the data upper limit number from a storage unit (not shown) (step S2-6). Further, the distribution server 2 distributes a distribution frame as a distribution scheduled amount to each genre based on the upper limit number of data and the reference ratio (step S2-7). For example, the upper limit number of data is “20”, and the reference ratio of “Eating and drinking facilities: Accommodation facilities: Medical facilities: Department stores / Supermarkets: Parks” is “40%: 20%: 10%: 20%: 10%”, respectively. ", The upper limit number of data is allocated based on the reference ratio. If the number of obtained data is not an integer, fine adjustment is performed so that the number of data of each genre becomes an integer.

  As a result, as shown in FIG. 8, the distribution frames F are “8”, “4”, and “park”, respectively, in “Eating and drinking facilities”, “Accommodation facilities”, “Medical facilities”, “Department / Supermarket”, It is distributed like “2”, “4”, “2”. At this time, the CPU 3 assigns the distribution frame F to the POI unit data 8A according to the order of priority based on the registration data 9A.

  Here, since the distribution frame F is distributed regardless of the number of facilities where data is updated, the distribution frame F may be excessive or insufficient depending on the genre. For example, the difference data of the genre of “food restaurant” has 11 POI unit data 8A, but the distribution frame F is “8”, so the distribution frame F is given to the three POI unit data 8A. No state. Also, the distribution frame F assigned to the genre “department / supermarket” is also in a state where two are insufficient. On the contrary, in the “accommodation facility”, although the distribution frame F is “4” even though the two POI unit data 8A are included, the two distribution frames F are in a state of remaining. Further, the distribution frame F of the “park” genre is also “1”.

Next, the distribution server 2 determines whether there is a genre that lacks the distribution frame F (step S2-8). Like the genres of “Eating and drinking facilities” and “Department stores / Supermarkets” above,
When the distribution frame F is smaller than the number of POI unit data 8A (YES in step S2-8), the total number of surplus distribution frames F as the surplus amount of other genres is acquired (step S2-9). The distribution frame F is distributed to the genre for which the distribution frame F is insufficient (step S2-10). At this time, if there is one genre in which the distribution frame F is smaller than the number of data of the difference data, the remaining distribution frame is included in all the POI unit data 8A that belong to the genre and to which no distribution frame F is assigned. F is given. When there are a plurality of such genres, the distribution frame F is distributed based on the reference ratio. For example, as illustrated in FIG. 8, when there are two more delivery frames F assigned to “accommodation facilities” and one delivery frame F assigned to “park”, the number of remaining delivery frames is three. become. On the other hand, since the reference ratio of “Food & Drink Facilities” and “Department Store / Supermarket” for which the distribution frame F is insufficient is “40%: 20%”, the number of distribution frames to be given to “Food & Drink Facilities” is “2”. And the number of distribution frames to be given to “department / supermarket” is “1”. As a result, among the three “Eating and drinking facilities G”, “Eating and drinking facilities H”, and “Eating and drinking facilities F” to which the distribution frame F is not granted, the “Eating and drinking facilities G” and “Eating and drinking facilities H” with high priority A distribution frame F is given. In addition, among the “super A” and “department A” to which no distribution frame F is assigned, the distribution frame F is assigned to “super A” having a high priority. At this time, for example, when the number of surplus delivery frames is “5” and the reference ratio of two genres for which the delivery frame F is insufficient is “10%: 20%”, the surplus delivery is performed. When the number of frames does not match the reference ratio, distribution is performed at a ratio close to the reference ratio of each genre. For example, the distribution frame F assigned to one genre is “2”, and the distribution frame F assigned to the other genre is “3”.

  When the distribution frame F is distributed in this way, the CPU 3 of the distribution server 2 determines the number of distribution frames as the number of distributions of each genre. Further, POI unit data 8A is extracted based on the number of distributions assigned to each genre, and the extracted data group is distributed to the navigation apparatus 10 as distribution data (step S2-11). And it returns to step S2-1 and waits for the timing of the next delivery start.

  On the other hand, if there is no genre in which the distribution frame F is less than the number of difference data in step S2-8 (NO in step S2-8), the same number of difference data as the distribution frame F is extracted from each genre. That is, since the distribution frame F is sufficient for all genres, all difference data is extracted. Then, the extracted data is distributed as distribution data to the navigation device 10 (step S2-11).

According to the above embodiment, the following effects can be obtained.
(1) In the above embodiment, the navigation device 10 acquires the number of destinations set for each genre, determines the reference ratio based on the set number of times, and transmits the reference ratio to the distribution server 2. The distribution server 2 acquires the data upper limit number of the POI data 8 distributed to the navigation device 10 and sets the distribution number for each genre based on the reference ratio acquired from the navigation device 10 and the data upper limit number. Also, the POI unit data 8A of the number of distributions assigned to each genre is extracted from the distribution data storage unit 7 and distributed to the navigation device 10. Therefore, by setting the number of POI unit data to be distributed to be equal to or less than the upper limit number of data, the amount of distribution data can be reduced and the POI data 8 that is highly necessary for the user can be distributed.

  (2) In the above embodiment, the distribution server 2 allocates the distribution frame F to each genre so that the total number of distributions of each genre is less than or equal to the upper limit number of data according to the genre reference ratio. Further, it is determined for each genre whether or not the distribution frame F is excessive or insufficient with respect to the number of data of the POI unit data 8A, and there are a genre in which the distribution frame F is insufficient and a genre in which the distribution frame F is excessive. In this case, the surplus distribution frame F is allocated to the genre for which the distribution frame F is insufficient. For this reason, update data with a high necessity for a user can be distributed over a wide genre.

(3) In the above embodiment, when there are a plurality of genres that lack the distribution frame F, the distribution frame F that is the remainder of the genre is assigned to the genre based on the reference ratio of the genre that lacks the distribution frame F. Allocate. Accordingly, since the distribution frame F is preferentially given to the genre that is highly necessary for the user, it is possible to distribute the POI data 8 that is highly necessary.

  (4) In the above embodiment, the distribution server 2 includes the registration data storage unit 9 for registering preset distribution conditions, rearranges each POI unit data 8A belonging to the genre according to the distribution conditions, and gives priority based on the distribution conditions. A distribution frame F assigned to the genre is assigned in descending order. For this reason, it is possible to distribute from update data that is highly necessary for the user.

In addition, you may change the said embodiment as follows.
In the above embodiment, the upper limit amount of data distributed to the navigation device 10 is the upper limit number of data, but may be limited by the data amount. In this case, for example, the amount of data is allocated for each genre, such as “10 MB” for “food facility”, and the POI unit data 8A is selected for each genre so as to be equal to or less than the allocated data amount.

  In the above embodiment, the reference ratio is calculated as the reference frequency based on the number of times set as the destination for each genre. However, the reference frequency may be set based on the searched number. For example, even when the genre of “food establishment” is searched for by genre and is not set as the destination, the counter value of the genre of “food establishment” may be incremented. When referred to, the counter value of the genre to which the point belongs may be incremented.

The schematic diagram of a data update system. The block diagram of a delivery server. The block diagram of a navigation apparatus. The conceptual diagram of POI data. The flowchart which shows the process sequence of a navigation apparatus. The flowchart which shows the process sequence of a delivery server. The conceptual diagram explaining rearrangement of POI unit data. The conceptual diagram explaining the provision of the delivery frame with respect to POI unit data.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Data update system, 2 ... Distribution server, 3 ... Upper limit amount acquisition means, Distribution amount setting means, Distribution means, Frequency reception means, CPU as control means, 7 ... Distribution data storage part as update information storage means, 8 ... POI data as update information, 9 ... Registration data storage unit as registration means, 10 ... Navigation device, 11 ... Frequency acquisition means, CPU as transmission means, 25 ... POI data as point reference information, 25B ... Genre, 23: POI data storage unit as reference information storage means, N: Network.

Claims (7)

In a data updating system comprising a navigation device comprising reference information storage means storing point reference information belonging to each genre, and a distribution server connected to the navigation device via a network,
The navigation device
Frequency acquisition means for acquiring the reference frequency of the point reference information for each genre and determining the reference frequency of the point reference information for each genre based on the reference frequency;
Transmission means for transmitting the reference frequency to the distribution server,
The distribution server
Update information storage means storing update information for updating the point reference information of the navigation device;
Upper limit amount acquisition means for acquiring an upper limit amount of the update information distributed to the navigation device;
Allocate a scheduled delivery amount in proportion to the reference frequency for each genre so that the total amount of the update information delivered to the navigation device is less than or equal to the upper limit amount, and based on the scheduled delivery amount, A delivery amount setting means for setting a delivery amount of update information;
A data update system comprising: a distribution unit that extracts the update information of the distribution amount set for each genre from the update information storage unit, and distributes the extracted update information to the navigation device. The data update system according to claim 1,
The delivery amount setting means includes :
Before each Symbol genre, the update information to determine whether or not there is an excess or deficiency of the planned distribution amount with respect to, the said genre planned distribution amount is insufficient, the planned distribution amount is excessive the When there is a genre, the distribution amount is set by allocating a surplus amount of the scheduled distribution amount of the genre for which the planned distribution amount is excessive to the genre for which the planned distribution amount is insufficient. Characteristic data update system. The data update system according to claim 2,
The delivery amount setting means includes:
When there are a plurality of genres for which the scheduled delivery amount is insufficient and there is the genre for which the scheduled delivery amount is excessive, the surplus amount of the scheduled delivery amount of the genre for which the scheduled delivery amount is excessive The data update system is characterized in that the distribution amount is set by allocating to each genre for which the scheduled distribution amount is insufficient at a rate corresponding to the reference frequency of each genre . In the data update system according to any one of claims 1 to 3,
The distribution server
In addition to further comprising a registration means for registering preset delivery conditions,
The delivery means includes
The data update system, wherein the update information of the distribution amount set in the genre is extracted in descending order of priority based on the distribution condition among the update information belonging to the genre. In a distribution server connected via a network to a navigation device provided with reference information storage means storing point reference information belonging to each genre,
Update information storage means storing update information for updating the point reference information of the navigation device;
Upper limit amount acquisition means for acquiring an upper limit amount of the update information distributed to the navigation device;
A frequency receiving means for acquiring, from the navigation device, a reference frequency of the point reference information for each genre determined based on a reference count of the point reference information for each genre;
Allocate a scheduled delivery amount in proportion to the reference frequency for each genre so that the total amount of the update information delivered to the navigation device is less than or equal to the upper limit amount, and based on the scheduled delivery amount, A delivery amount setting means for setting a delivery amount of update information;
A distribution server comprising: a distribution unit that extracts the update information of the distribution amount for each genre from the update information storage unit and distributes the extracted update information to the navigation device. A navigation device comprising reference information storage means storing point reference information belonging to each genre, and an update information storage connected to the navigation device via a network and storing update information for updating the point reference information In a data update method for updating the point reference information using a distribution server comprising means,
The navigation device is
Obtaining the reference frequency of the point reference information for each genre , determining the reference frequency of the point reference information for each genre based on the reference frequency, and transmitting the reference frequency to the distribution server;
The distribution server is
The upper limit amount of the update information to be distributed to the navigation device is acquired , and a distribution schedule according to the reference frequency for each genre so that the total amount of the update information to be distributed to the navigation device is equal to or less than the upper limit amount Allocates an amount, sets the distribution amount of the update information for each genre based on the scheduled distribution amount, extracts the update information of the distribution amount for each genre from the update information storage means, and extracts the extracted information A data update method, wherein update information is distributed to the navigation device. Control means connected via a network to a navigation device comprising reference information storage means storing point reference information belonging to each genre, and update information storage means storing update information for updating the point reference information In the data update program for updating the point reference information using
The control means;
Upper limit amount acquisition means for acquiring an upper limit amount of the update information distributed to the navigation device;
A frequency receiving means for acquiring, from the navigation device, a reference frequency of the point reference information for each genre determined based on a reference count of the point reference information for each genre;
Allocate a scheduled delivery amount in proportion to the reference frequency for each genre so that the total amount of the update information delivered to the navigation device is less than or equal to the upper limit amount, and based on the scheduled delivery amount, A delivery amount setting means for setting a delivery amount of update information;
A data update program that extracts the update information of the distribution amount for each genre from the update information storage unit and functions as a distribution unit that distributes the extracted update information to the navigation device.

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