JPH11154973A - Information communication system and communication terminal equipment adopting the system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the terminal equipment to use data that are not acquired even when the terminal equipment cannot acquire desired data from a broadcast station or a beacon system. SOLUTION: A broadcast station 2 or a beacon system 3 sends data to an on-vehicle terminal equipment 5 in a prescribed data transmission timing. An information center 1 connects with the on-vehicle terminal equipment 5 in a communication enable state and gives data auxiliary to the on-vehicle terminal equipment 5 on request. An on-vehicle computer 8 of the on-vehicle terminal equipment 5 receives unacquired data from the information center 1 when the computer 8 cannot acquire data from the broadcast station 2 or the like in the transmission timing. In this case, the on-vehicle computer 8 sets a data supply timing in response to contents of the data and requests supply of data to the information center 1 when the supply timing comes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information communication system and a communication terminal device applied to the system.
In particular, the present invention relates to a process performed when a communication terminal device cannot obtain desired data.

[0002]

2. Description of the Related Art Conventionally, there has been proposed an information communication system in which an in-vehicle terminal device obtains information used for traveling of a vehicle by communication from outside. It has been proposed to use FM multiplex broadcast, optical beacon, radio beacon, satellite broadcast, and the like for information communication. For example, Japanese Patent Application Laid-Open No. 8-88619 discloses an apparatus for receiving FM multiplex broadcasting, and Japanese Patent Application Laid-Open No. 5-67295 describes a navigation apparatus for acquiring road information from road beacons. ing.

[0003]

The above-mentioned vehicle information includes:
At a timing determined by a data transmission center such as a broadcasting station, the data is transmitted to vehicles in the target area. However, when the vehicle cannot receive the desired data for some reason, there is a problem that the desired data cannot be used.

[0004] For example, when the vehicle is not used at the data transmission timing or when the on-vehicle communication device is turned off, data cannot be received. Also, even when the vehicle is not in the target area, the desired data cannot be received. This is a case in which it is not directly under a broadcasting area such as FM or a beacon device. In addition, even if data can be received, some or all of the data may not be normally received due to the influence of a weak electric field, noise, or the like. As described above, when data transmitted at a predetermined transmission timing from a data transmission center such as a broadcasting station or a beacon device cannot be obtained, the vehicle cannot use the data.

[0005] The above problem is not limited to a system for providing information to a vehicle. A similar problem may occur in an information communication system including a terminal device other than the vehicle, for example, a mobile terminal device or a stationary personal computer (for home use, office use, etc.).

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a terminal device capable of separately obtaining, when a terminal device cannot obtain desired data, the data later. A communication system is provided.

[0007]

(1) In an information communication system according to the present invention, in a system in which a communication terminal device acquires data by communication, data is transmitted to a plurality of communication terminal devices at a predetermined transmission timing. A data supply center; and a data replenishment center communicably connected to each of the plurality of communication terminal devices and supplementarily supplying data in response to a request from the communication terminal device. Each communication terminal device is a replenishment timing setting means for setting a replenishment timing for receiving resupply of unacquired data when desired data cannot be acquired from the data transmission center,
Replenishment requesting means for requesting the data replenishment center to supply unacquired data at the replenishment timing.

Preferably, the replenishment timing setting means sets the replenishment timing to a timing after a predetermined allowable time has elapsed from the transmission timing, based on the content of the desired data and the transmission timing of the data. The predetermined allowable time is set according to the contents of the desired data.

According to the present invention, in the communication terminal device, the supply timing of the unacquired data is set by the supply timing setting means. When the replenishment timing comes before desired data cannot be obtained from the data transmission center, the replenishment requesting unit requests the data replenishment center to supply unacquired data. The data supply center sends the data to the terminal device in response to the request. As described above, according to the present invention, when data transmitted from the data transmission center at a predetermined transmission timing cannot be obtained, the communication terminal device can obtain the desired data from the data supply center. .

In particular, the present invention, as described below,
It works suitably in a situation where provided information is diversified and enriched with the development of information communication systems such as vehicles. In a situation where various types of information are provided, some types of information are updated frequently, while other types of information are updated after a certain period such as one month or several months.
Also, certain information is important to the user and needs to be obtained as soon as possible. On the other hand, certain other information is less important and the acquisition of that information may be slower. The importance of the content (type) of the information differs depending on the user. According to the present invention, the data replenishment timing can be appropriately set according to the data content and the transmission timing. This makes it possible to acquire necessary data at an appropriate timing and prepare for use in the terminal device.

Further, according to the present invention, when a part of desired data cannot be obtained from the data transmission center,
It is preferable that the communication terminal device obtains only a part of the data from the data supply center.

(2) Preferably, when the interval between the current time and the next transmission timing is equal to or smaller than a predetermined value, the communication terminal device suppresses replenishment of unacquired data. According to this aspect, when the current time is already close to the next transmission timing, data supply is not performed, and after the next transmission timing, data transmitted from the data transmission center is acquired. As described above, when the transmission timing is approaching, the terminal device acquires data from the data transmission center as much as possible. Therefore, it is possible to reduce the load on the communication device of the data replenishment center, to avoid the occurrence of congestion of the communication line related to the replenishment center, and to reduce the communication cost of the communication terminal device.

(3) A communication terminal device according to one aspect of the present invention is a device for obtaining data transmitted from a data transmission center at a predetermined transmission timing by communication, and assists the terminal device with data. Replenishment communication means for performing data communication with a data replenishment center for supplying data, and replenishment timing setting means for setting replenishment timing for receiving replenishment of unacquired data when desired data cannot be acquired from the data transmission means And replenishment requesting means for requesting the data replenishment center to supply unacquired data at the replenishment timing.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention (hereinafter, referred to as embodiments) will be described below with reference to the drawings. In the present embodiment, the present invention is applied to an information communication system for a vehicle.

FIG. 1 is a block diagram showing the overall configuration. As shown, the information center 1 collects various data such as map data, road regulation data, traffic congestion data, news, and weather forecast from the outside, and stores them in a database (not shown). The information center 1 processes the collected data for various services. The information center 1 may acquire the processed data from outside. In addition, the information center 1 also prepares various programs such as a navigation program as service data. For example,
About the navigation program once a month,
Updates and changes are made.

The information center 1 sends service data to the broadcasting station 2 and the data is transmitted from the broadcasting station 2 to the broadcasting antenna 2a.
Broadcast using. In the present embodiment, FM multiplex broadcasting is performed, but data may be broadcast in another broadcasting format. For example, satellite broadcasting or TV multiplex broadcasting may be performed.

The information center 1 sends service data to the beacon device 3, and the beacon device 3 transmits the data to a vehicle 4 passing nearby. The beacon device 3
In addition to being provided on a road as is well known, it is more preferable to install it at a doorway of a store, a gas station, a parking lot, or the like. Further, the beacon device 3 of the present embodiment is of a radio wave type, but an optical beacon device can be similarly applied to the present invention.

The data broadcasting by the broadcasting station 2 and the data transmission by the beacon device 3 are performed according to a predetermined schedule. That is, each data is transmitted (broadcast or transmitted) to the vehicle 4 when the transmission timing of the data comes.

The vehicle 4 is provided with an in-vehicle terminal device 5, and the in-vehicle terminal device 5 includes
By receiving radio waves from, service data is acquired.

The information center 1 performs direct data communication with the vehicle-mounted terminal device 5 using a car telephone. As a result, the information center 1 functions as a data supply cell of the present invention described later, and supplies the vehicle 4 with data that the vehicle 4 could not acquire from the broadcast station 2 or the like.

FIG. 2 shows the configuration of the vehicle-mounted terminal device 5. In FIG. 2, a vehicle computer 8 controls the entire terminal device, and includes a navigation computer, V
It functions as an ICS (Vehicle Information and Communication System) computer and a telephone computer. The vehicle computer 8 calculates the current position of the vehicle based on the signal received by the GPS antenna 15 from the artificial satellite. When the user inputs a travel destination using the input unit 9, the vehicle computer 8 outputs
A route to a destination is searched for and set using map data and road data for navigation stored in the D-ROM (DVD) 11. A well-known method such as the Dijkstra method is used for the route calculation. Then, the vehicle computer 8 performs route guidance using the display unit 10 and a speaker (not shown) based on the set route. In addition, the input unit 9 is used by a user to input various instructions to the in-vehicle terminal device 5.

A radio wave broadcast by the broadcasting station 2 using the broadcasting antenna 2a is received by the antenna 6a,
Demodulated by the receiver 7a. The radio wave transmitted by the beacon device 3 is received by the antenna 6b and demodulated by the second receiver 7b. These demodulated data are sent to the vehicle computer 8. Vehicle computer 8
Processes and uses the data thus obtained from the broadcast station 2 and the beacon device 3. The service data is displayed on the display unit 10, output from a speaker (not shown), or stored in the storage unit 12, and used for various processes such as route guidance.

The in-vehicle terminal device 5 is provided with a telephone 13 and a telephone antenna 14. The telephone 13 is controlled by the vehicle computer 8 and performs two-way wireless communication with the information center 1 in FIG. The vehicle computer 8 uses the telephone 13 to obtain from the information center 1 data that could not be obtained from the broadcast station 2 or the beacon device 3.

Next, FIG. 3 shows the broadcast station 2 and the beacon device 3
2 shows an example of the configuration of data transmitted by the. Data is composed of frames. The first frame is
It includes a frame number 16a and a data section 16b. The data section 16b includes a header information section 16x and an actual data section 16y. The header information section 16x includes the genre (content type) of the data, the data update time ta, the next scheduled update time tb, and the total number of frames. Frames after the second frame are frame numbers 17a, 18a,.
. And actual data portions 17b, 18b,.

As described above, in the present embodiment, service data is sent for each genre. That is, each data includes data of one genre (for example, a genre such as a map or news). From the header information of each data, the time ta at which the data was updated and the scheduled time tb at which the data will be updated next can be known.

Next, the operation of the information communication system of this embodiment will be described. As described above, service data having the configuration shown in FIG. 3 is generated by the information center 1 and sent to the broadcasting station 2. Then, when the broadcast time of the data comes according to a predetermined broadcast schedule, the data is broadcast. Similarly, the service data is sent to the beacon device 3 and transmitted when the transmission time of the data comes according to a predetermined transmission schedule. In the in-vehicle terminal device 5, radio waves are received by the antennas 6a and 6b. The first receiver 7a and the second receiver 7b demodulate radio waves,
The vehicle computer 8 processes the demodulated data.

However, when the vehicle is not used at the data transmission timing or when the on-vehicle communication device is turned off, the above-described data cannot be received. Further, data may not be received because the vehicle 4 is not near the broadcasting area of the broadcasting station 2 or the beacon device 3. In addition, even if data can be received, some or all of the data may not be normally received due to the influence of a weak electric field, noise, or the like. In such a case, conventionally, information provided from the broadcast station 2 or the beacon device 3 cannot be used. In the present embodiment, as shown in the flowchart of FIG.
Receives supply of unacquired data from the information center 1 under the control of the vehicle computer 8.

In FIG. 4, the vehicle computer 8 comprises:
Based on the current time t, it is determined whether the allowable update delay time T has elapsed from the scheduled update time tb (t> tb).
+ T or not) (S1). The allowable update delay time T is a time indicating “how much time has passed since the data update time has elapsed and new data has not been obtained yet, data is to be replenished”. Determines the data supply timing. Allowable update delay time T
Are set in advance and stored in the storage unit 12.

The above-mentioned permissible update delay time T is set differently for each data genre. The update time differs depending on the data genre (contents, ie, news, map, etc.). Since data of a certain genre is frequently updated, it is desired to replenish data quickly. On the other hand, data of a certain genre is updated at relatively long intervals, and there is little significant update. Therefore, it is considered that quick data supply is unnecessary. The importance of data differs depending on the genre of data. Certain genre data is important and needs to be obtained as soon as possible. On the other hand, data of a certain genre is not so important, and the acquisition of the information may be delayed. The allowable update delay time T of the data of each genre is set differently in consideration of such data update frequency and importance.

The importance of the above data differs depending on the user. Therefore, the user can determine “how long after the data is updated how long do you want new data”, and can set the allowable update delay time T by himself. In this case, the user uses the input unit 9 of the in-vehicle terminal device 5 to input the allowable update delay time T. Also in this case, the allowable update delay time T can be set for each genre. The vehicle computer 8 sets the allowable update delay time T as instructed by the user, and stores it in the storage unit 12.

Returning to FIG. 4, in S1, the vehicle computer 8 determines the data stored in the storage unit 12. Here, the next update scheduled time tb of each data and the allowable update delay time T for the data are referred to. If the determination in S1 is NO for data of a certain genre, the processing for the data of that genre is terminated. If the determination in S1 is YES for data of a certain genre, the allowable update delay time T has already elapsed from the next scheduled update time tb for the data of the genre. Therefore, the data supply processing of S2 and below is performed.

In S2, the vehicle computer 8 refers to the data in the storage unit 12 and determines whether or not a part of the updated data has been received. As shown in FIG. 3, the data is composed of a group of frames, and data of some frames in the update data may be normally acquired. In this case, the vehicle computer 8 controls the telephone 13 to request the information center 1 to transmit the data of the remaining frames. In response to a request from the vehicle, the information center 1 reads out the corresponding data from the database and transmits the data to the vehicle. Thus, the remaining data is downloaded from the information center 1 to the in-vehicle terminal device 5 (S3).

On the other hand, in S2, there is a case where not all data has been obtained. For example, if the vehicle has not been used at the update time ta, the determination in S2 is NO.
In this case, all of the data (data of all frames) is downloaded from the information center 1 to the in-vehicle terminal device 5 (S4). Also at this time, the vehicle computer 8 controls the telephone 13 to request the information center 1 to supply data. In response to a request from the vehicle, the information center 1 reads out the corresponding data from the database and transmits the data to the vehicle.

The data received by the telephone 13 in S3 or S4 is sent to the vehicle computer 8. The vehicle computer 8 processes the received data. The received data is
Like the data acquired from the broadcast station 2 and the beacon device 3, the data is displayed on the display unit 10, output from a speaker (not shown), or stored in the storage unit 12 and used for various processes.

As described above, in this embodiment,
The broadcasting station 2 and the beacon device 3 correspond to a data transmission center of the present invention, and the information center 1 corresponds to a data supply center. In the in-vehicle terminal device 5, the vehicle computer 8 functions as a replenishment timing setting unit that sets replenishment timing, and also functions as a replenishment request unit that requests data supply.

In the present embodiment, the replenishment timing is the time (tb + T) when the allowable update delay time T has elapsed from the next scheduled update time tb (see FIG. 5). That is, when the allowable update delay time T passes after the transmission timing of the new data, the supply timing comes. The replenishment timing (tb + T) is set based on factors such as the importance of data as described above.

When the switch of the vehicle-mounted terminal device 5 is turned off at tb + T, data replenishment is performed when the switch is turned on thereafter. Further, when the vehicle 4 is out of the communication area at tb + T, data supply is performed after the communication is restored. As described above, the timing at which data is actually supplied is tb + T or a later communicable point.

In the above description, the data header information section 1
The next update scheduled time tb was included in 6x. On the other hand, as shown in FIG.
The data update interval t instead of the next scheduled update time tb
If c is included, the process shown in the flowchart of FIG. 7 is performed.

In FIG. 7, the vehicle computer 8 comprises:
Based on the current time t, it is determined whether the data update interval tc has elapsed from the data update time ta and whether the allowable update delay time T has elapsed (whether t> ta + tc + T) (S6). ta + tc is the next scheduled update time tb
Is equivalent to The permissible update delay time T is the same as that set in FIG. 4 and is stored in the storage unit 12. FIG.
Similarly to the above, in S6, a determination is made on the data of each genre based on the permissible update delay time T of the genre. Then, for certain data, the determination in S6 is N
In the case of O, the processing for the data ends. If the determination in S6 is YES for certain data, data replenishment processing in S7 and subsequent steps is performed for that data.

First, in S7, it is determined whether or not the cancel time Td has been set. Here, on the information center 1 side, every time the data update interval tc elapses,
Data is updated. In consideration of this, the cancel time Td is set to “suppress data replenishment when the next data update is near.” If the cancellation time Td is not set, S
The process proceeds to step S9, where the same data replenishment process as that of FIG. 4 is performed. When the cancellation time Td is set, ta +
It is determined whether (n + 1) tc> t ≧ ta + (n + 1) tc−Td (S8). Here, n is a natural number. Referring to FIG. 8, if S8 is YES, the current time is within the prohibited period (prohibited period until the nearest data update time) in the figure. The prohibition period is a period within the cancellation time Td from the next update time, and during the prohibition period, data supply is prohibited. Therefore, if S8 is YES, the processing for the data of interest ends.

As described above, during the prohibition period, data supply from the information center 1 is suppressed, and data is acquired from the broadcast station 2 or the like after the next update time. This eliminates waste such as acquiring update data immediately after data replenishment, and reduces communication costs. Further, the load on the communication device of the information center 1 can be reduced, and congestion of the communication line can be avoided.

The above processing is effective, for example, when the vehicle 4 or the in-vehicle terminal device 5 has not been used for a relatively long time. It is assumed that after the update data is obtained at ta in FIG. 8, the in-vehicle terminal device 5 is not used, and thereafter, the switch of the in-vehicle terminal device 5 is turned on at time tx. At this time, a total of three updates have already been performed at times ta1, ta2, and ta3. However, as shown,
Since the next update time ta4 is near, data supply is not performed.

It is preferable that the cancel time Td be set differently for each data genre in accordance with the data update interval tc and the degree of importance, similarly to the permissible update delay time T described above. Further, the user can operate the input unit 9 to input the cancel time Td.

If the determination in S8 in FIG. 7 is NO, the current time t is the supply permission period (period other than the prohibition period) in FIG.
Is within. Since the next update time is still far, processing similar to that in FIG. 4 is performed. The vehicle computer 8 includes a storage unit 12
It is determined whether or not a part of the updated data has been received by referring to the data (S9). If some data has been obtained, the remaining data is downloaded from the information center 1 (S10). If not all data has been obtained, all the data is downloaded from the information center 1. (S11). The downloaded received data is processed by the vehicle computer 8 (S12).

In the process shown in FIG. 7, the data update interval tc was included in the header of the data. On the other hand, the data update interval tc may be obtained from separately acquired information such as service guidance. The same applies to the next scheduled update time tb used in the processing of FIG. 4 and may be obtained from another information source.

In the processing shown in FIGS. 4 and 7, the next scheduled update time tb and the data update interval tc are known. Next, with reference to FIG. 9, a process when the vehicle computer 8 does not know these pieces of information will be described.

In FIG. 9, data 100 is currently stored in the storage unit 12 of the vehicle-mounted terminal device 5. It is assumed that the data 100 is updated at the time ta by the information center 1 and is acquired by the vehicle-mounted terminal device 5 at the time t1.
The next update is performed at time ta1, and data 200 is provided at the time of update. However, the vehicle computer 8
Does not know the next update time ta1. FIG.
This is because the next update scheduled time tb and the data update interval tc are not included in the header information section 16x of the data 100 as shown in FIG.

The vehicle computer 8 sets a desired update check interval Te for use in the data supply process. When the desired update check interval Te elapses from the previous update time ta, the vehicle computer 8 accesses the information center 1 using the telephone 13. At the time of this access, the vehicle computer 8 inquires of the information center 1 whether or not the update from the data 100 to the data 200 has already been performed. The vehicle computer 8 sets the access time tf
Record If the data has not been updated at the time of access, the same inquiry access is performed every time the desired update check interval Te elapses thereafter. During this time, if the data 200 is acquired from the broadcasting station 2 or the beacon device 3 at the actual update time ta1, the data supply is not necessary. However, when the vehicle is not used at the update time ta1, the data 200 is stored at the time ta1.
1 has not been obtained. In this case, the actual update time ta
It can be seen that the data has already been updated at the time of the next inquiry access (time t2) after 1. Then, the update data 200 is supplied from the information center 1 to the in-vehicle terminal device 5.

As described above, in the processing of FIG. 9, the replenishment timing comes repeatedly every time the desired update check interval Te elapses. However, the next data update (transmission)
If it is before the time, no data is supplied. on the other hand,
If the next data update time has already passed at the supply timing, data supply is performed.

FIG. 11 is a flowchart for realizing the processing of FIG. The vehicle computer 8 determines whether the time data is stored in the memory for recording the inquiry access time tf (S13). If not (if reset), it is determined whether or not the desired update check interval Te has elapsed from the data update time ta (S14). If not, the process ends.
When S14 is YES, the process proceeds to S16, and the vehicle computer 8 performs the first inquiry access shown in FIG. 9 to the information center 1 (S16). At this time, the access time tf is recorded. The data update time ta
If the switch of the in-vehicle terminal device 5 has been turned off when the desired update check interval Te has elapsed since then, the inquiry access and the recording of the access time tf are performed when the switch is turned on. When the vehicle 4 is out of the service area of the telephone 13, the access is performed when the communication is restored. The vehicle computer 8 determines whether the data has already been updated based on the result of the inquiry (S17). If it has been updated, the updated data is downloaded from the information center 1 (S18). Here, the vehicle computer 8 and the information center 1 are connected via the telephone 13 similarly to the processing of FIGS. Then, the vehicle computer 8 requests the information center 1 to supply data, and the information center 1 sends the data in response to the request. Although not shown in FIG. 11, if some data has been acquired, the remaining data is downloaded as in FIGS. 4 and 7. At S18, the recorded inquiry access time tf is further reset. Then, the downloaded data is processed by the vehicle computer 8 (S19).

On the other hand, if the result of the inquiry indicates that the data has not been updated yet, the processing is terminated. When the processing of FIG. 11 is performed next time and thereafter, the time data is stored in the memory for recording the access time tf. This is because the first access has already been performed. Therefore, the determination in S13 is YES, and S1
Go to 5. In S15, it is determined whether or not the desired update check interval Te has elapsed since the previous access time tf, and if not, the process ends. If the time has elapsed, the process proceeds to S16, and the processes after S16 are performed in the same manner as the previous time. Also at this time, if the switch of the in-vehicle terminal device 5 is off, access is performed after the switch is turned on. If the data has been updated, the data is downloaded, and the access time tf is reset. If the data has not been updated yet, the current access time tf is recorded.

The preferred embodiment of the present invention has been described above. As described above, according to the present embodiment, even when the in-vehicle terminal device 5 cannot acquire data transmitted from the broadcast station 2 or the beacon device 3 at a predetermined transmission timing,
The supply of the data is received from the information center 1, and the data can be used. In particular, the replenishment timing can be set according to the importance of the data by adjusting the allowable update delay time T. Therefore, important data is acquired early, and less important data is acquired later.
As described above, necessary data can be efficiently acquired at an appropriate timing.

Further, according to the present embodiment, by setting the cancel time Td, data replenishment is suppressed when the next data update time is near. Therefore, the load on the communication device of the information center 1 can be reduced, and congestion of the communication line can be avoided. Further, the communication cost of the in-vehicle terminal device 5 is reduced.

In the present embodiment, the present invention is applied to a vehicle information communication system, but the present invention is not limited to such a configuration. The terminal device may be a portable terminal device or a stationary personal computer (for home use or office use).

Further, in the present embodiment, the vehicle-mounted terminal device 5 directly accesses the information center 1 when replenishing data. On the other hand, the in-vehicle terminal device 5 may access another facility such as the broadcasting station 2 and download the supply data from the facility. Further, replenishment data may be downloaded from the information center 1 via another facility.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of an information communication system according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of an in-vehicle terminal device of the system of FIG. 1;

FIG. 3 is a diagram showing data supplied to a vehicle in the system of FIG. 1;

FIG. 4 is a flowchart showing a process for replenishing data that could not be obtained from a broadcast station or a beacon device from an information center.

FIG. 5 is a diagram showing a supply timing set in the process of FIG.

FIG. 6 is a diagram showing a second example of data supplied to the vehicle in the system of FIG.

FIG. 7 is a flowchart illustrating a second example of a process for replenishing data that could not be obtained from a broadcasting station or a beacon device from an information center.

FIG. 8 is a diagram showing the supply timing set in the process of FIG. 7;

FIG. 9 is a time chart showing a data replenishment process when the next update scheduled time and the data update interval are unknown.

FIG. 10 is a diagram showing data supplied to the vehicle in the process of FIG.

FIG. 11 is a flowchart showing the flow of the process in FIG. 9;

[Explanation of symbols]

1 information center, 2 broadcast station, 3 beacon device, 4
Vehicle, 5 in-vehicle terminal device, 6a, 6b antenna, 7a
First receiver, 7b Second receiver, 8 Vehicle computer, 9 Input unit, 10 Display unit, 11 CD-ROM
(DVD), 12 storage unit, 13 telephone, 14 telephone antenna, 15 GPS antenna.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04L 12/18 H04L 11/18 29/08 13/00 307Z // H04H 1/02

Claims (4)

[Claims] 1. An information communication system in which a communication terminal device acquires data by communication, a data transmission center for transmitting data to a plurality of communication terminal devices at a predetermined transmission timing, and each of the plurality of communication terminal devices And a data replenishment center that is communicably connected to and supplies data supplementarily in response to a request from the communication terminal device. Each of the communication terminal devices failed to acquire desired data from the data transmission center. Supply timing setting means for setting supply timing for receiving supply of unacquired data, and supply request means for requesting the data supply center to supply unacquired data at the supply timing. Information communication system. 2. The system according to claim 1, wherein the replenishment timing setting means determines the replenishment timing based on the content of the desired data and the transmission timing of the data by a predetermined allowable time from the transmission timing. An information communication system wherein the predetermined allowable time is set according to the content of the desired data. 3. The system according to claim 1, wherein the communication terminal device suppresses replenishment of unacquired data when an interval between a current time and a next transmission timing is equal to or less than a predetermined value. An information communication system, comprising: 4. A communication terminal device for acquiring data transmitted from a data transmission center at a predetermined transmission timing by communication, and performing data communication with a data replenishment center for supplementarily supplying data to the terminal device. Replenishment communication means, replenishment timing setting means for setting replenishment timing for receiving resupply of unacquired data when desired data cannot be acquired from the data transmission means, supply of unacquired data at the replenishment timing And a replenishment requesting means for requesting the data replenishment center.