JP2013228810A - Information processing terminal, information processing system, data reception program, and data reception method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information processing terminal, an information processing system, a data reception program, and a data reception method which can receive the latest data while avoiding data communication by roaming service as much as possible.SOLUTION: An information processing terminal having a navigation function comprises: communication means which enables wireless data communication; determination means which determines whether roaming service communication occurs on the basis of a route R to a destination set by the navigation function; and control means. When it is determined that the roaming service communication occurs, the control means estimates the reception time Tb for the roaming service to receive necessary succeeding data, determines a reception start position P on the basis of the estimated result, and receives the succeeding data in advance.

Description

  The present invention relates to an information processing terminal capable of receiving data wirelessly on a mobile object, and more particularly to a data receiving method when roaming occurs.

  In a moving body such as a vehicle, an information processing terminal having a navigation function for guiding a route to a destination is used. Some information processing terminals are fixed to the moving body, while others are portable. Some information processing terminals are specialized for the navigation function, and some information processing terminals include the navigation function in some functions. The latter information processing terminal is represented by a mobile phone, a multifunctional smartphone, a laptop computer, and the like.

  Such an information processing terminal has a function of acquiring necessary information from an information distribution server by using wireless communication. However, wireless communication is easily affected by the communication environment, and data communication is interrupted when communication sensitivity deteriorates. For example, data communication cannot be performed while traveling outside a tunnel, underground parking lot, or reception area. Therefore, if a section such as a tunnel that cannot be wirelessly connected is detected in the traveling direction of the mobile object, the data required for traveling in the unconnectable section is downloaded before reaching the unconnectable section. An information distribution system has been proposed (Patent Document 1).

  In addition, in the case of an information processing terminal that acquires map data around the vehicle position from the information distribution server and displays the map data, it cannot be acquired in an instant because the capacity of the map data is large. Map data cannot be displayed with the movement of the position, or display takes time. Thus, it has been proposed to determine the moving direction from the current location to the destination and to obtain map data along the moving direction in advance (Patent Document 2).

JP 2004-193955 A JP 2007-121153 A

  Data communication charges for information processing terminals such as mobile phones are often considerably higher when used overseas (when roaming) than when used domestically. For example, while it is 0.05 euro / Mbyte in Japan, it is 0.80 euro / Mbyte during roaming. For this reason, you should avoid downloading large amounts of data as much as possible while roaming. However, if you become roaming while using the navigation function in an environment where you can go abroad by car like in Europe, the data communication fee will be expensive without notice, or depending on the settings of the mobile phone The function itself may become unusable. In addition, the problem of communication charges can be avoided by downloading all data in advance, but there is a problem that data such as traffic jam information is not up-to-date.

  The present invention solves the above-described conventional problems, and an information processing terminal, an information processing system, a data receiving program, and a data receiving method capable of receiving the latest data while avoiding data communication by a roaming service as much as possible The purpose is to provide.

  An information processing terminal according to the present invention includes a navigation function, and includes a communication unit that enables data communication with the outside, and a processing unit that can execute data processing using at least data acquired by the communication unit. And at least the storage means capable of storing the data acquired by the communication means, and the route information to the destination set by the navigation function, the data is received outside the communication service range of the information processing terminal. An estimation means for estimating whether or not it is necessary, and if the estimation means determines that it is necessary to receive data outside the range of the communication service, the preceding data that would be necessary while traveling outside the range of the communication service Control means for controlling the communication means so as to be received during traveling within the range of the communication service.

  Preferably, the control means includes an estimation means for estimating a reception time required for reception of preceding data that would be necessary while traveling outside the range of the communication service, and the control means receives the reception estimated by the estimation means. Based on the time, the communication means starts receiving the preceding data. Preferably, the control means predicts an arrival time to reach out of the range of the communication service based on speed information of the own vehicle or speed information set in the route information, and the control means is configured to predict the estimated reception time. And the arrival time are compared, and a position to start receiving the preceding data is determined based on the comparison result. Preferably, the communication means makes a transmission request to the outside, receives data transmitted from the outside in response to the transmission request, and the control means performs the preceding request while traveling within the range of the communication service. A transmission request for receiving data is transmitted to the communication means.

  Preferably, the estimation means estimates the reception time of the preceding data based on a distance from a position outside the range of the communication service to the destination. Preferably, when the processing means is executing a navigation function, the communication means receives map data as the preceding data. Preferably, the communication means receives road traffic information as the preceding data. Preferably, when the processing means is reproducing media data received from the outside via the communication means, the communication means receives the media data being reproduced as the preceding data. Preferably, the information processing terminal further includes roaming determination means for determining whether or not the data is received by a roaming service outside the range of the communication service, and the control means is receiving data by the roaming service. If it is determined, the reception of data by the communication means is stopped. Preferably, when it is determined that the data is received by the roaming service when the route to the destination is set by the navigation function, the control means performs the communication until the roaming service is canceled. Stop receiving data by means. Preferably, the information processing terminal further includes storage means for storing area information for identifying an area of the communication service, and the determination means and the roaming determination means make a determination based on the area information.

  An information processing system according to the present invention includes the above information processing terminal and an electronic device that is connected to the information processing terminal via wireless communication and transmits data to the information processing terminal.

  A data receiving program according to the present invention is acquired by a communication unit that enables data communication with the outside, a processing unit that can execute data processing using at least data acquired by the communication unit, and at least the communication unit. An information processing terminal having storage means capable of storing the received data, the step of executing a navigation function by the processing means, and the information processing based on the route information searched by execution of the navigation function A step of estimating whether it is necessary to receive data outside the range of the communication service of the terminal; and if it is estimated that data reception is necessary outside the range of the communication service, the vehicle travels outside the range of the communication service. To receive the preceding data that will be received during the travel within the range of the communication service And a step of controlling the communication means.

  The data receiving method according to the present invention includes a communication unit that enables data communication with the outside, a processing unit that can execute data processing using at least data acquired by the communication unit, and at least acquired by the communication unit. An information processing terminal having storage means capable of storing the data, the step of executing the navigation function by the processing means, and the information processing terminal of the information processing terminal based on the route information searched by the execution of the navigation function Estimating whether it is necessary to receive data outside the range of the communication service; and if it is estimated that data reception is necessary outside the range of the communication service, while traveling outside the range of the communication service The communication means so as to receive the preceding data that would be necessary while traveling within the range of the communication service And a step of controlling.

  According to the present invention, it is possible to receive the preceding data that may be required to be received by using a roaming service or the like outside the communication service while traveling within the range of the communication service. Prior data can be obtained before the data communication fee becomes high, and it is possible to prevent the data communication fee due to the roaming service or the like from becoming high. In addition, since the reception of the preceding data is started based on the estimation result of the reception time of the preceding data, the latest data as much as possible can be received.

It is a figure explaining the structural example of the information processing system which concerns on the Example of this invention. It is a block diagram which shows the structural example of the information processing terminal which concerns on the Example of this invention. It is a figure which shows the main functions contained in the information processing terminal which concerns on the Example of this invention. It is a figure explaining the road map data received from a server, when a navigation function is performed in the information processing terminal which concerns on the Example of this invention. It is a figure which shows the main functions contained in the data communication function based on the Example of this invention. It is a flowchart explaining the data reception operation | movement when roaming generate | occur | produces in the information processing terminal which concerns on 1st Example of this invention. It is a flowchart explaining the data reception operation | movement when roaming generate | occur | produces in the information processing terminal which concerns on 1st Example of this invention. It is a figure explaining the reception operation | movement of the preceding data by 1st Example of this invention. It is a flow explaining the estimation operation | movement of the reception time of the prior | preceding data by 1st Example of this invention. It is a figure explaining the effect by the 1st example of the present invention. It is a figure explaining the modification of reception of the preceding data in 1st Example of this invention. It is a flow explaining the data reception operation | movement by 2nd Example of this invention. It is a flow explaining the data reception operation | movement by the 3rd Example of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings. The information processing terminal according to the present invention is mounted on a vehicle or the like as a moving body and used there. The information processing terminal of the present invention is not limited to a terminal or device fixed in advance on a mobile body, but may be a portable or portable terminal or device that can be brought into the mobile body. In a preferred embodiment, the information processing terminal can be a multi-function terminal having a function of processing data, a data communication function, and a data output function, such as a mobile phone, a smartphone, a palmtop personal computer, a lap Top-type computers, notebook computers, and the like. Further, the information processing terminal may be capable of executing various applications by a program, and may have a navigation function, a function for reproducing media data such as music and images, and the like. These functions can also be executed using data received from an external server or the like.

  FIG. 1 is a diagram illustrating an outline of an information processing system according to an embodiment of the present invention. The information processing system 10 includes an information processing terminal 20 placed on a moving body, and a server 40 connected to the information processing terminal 20 via a wireless communication network 30.

  The wireless communication network 30 includes a base station 32 that emits a radio signal at a constant intensity, and a network 34 such as the Internet connected to the base station 32. The information processing terminal 20 existing in the area covered by the base station 32 enables wireless data communication with various servers 40 to 40n via the wireless communication network 30. For communication between the information processing terminal 20 and the base station 32, wireless communication such as a public wireless network or LAN, WAN, WiFi, or the like can be used. The information processing terminal 20 itself may have a wireless communication function, or a communication terminal such as a mobile phone may be connected thereto if the navigation apparatus is fixed to the vehicle. Such an information processing terminal 20 is placed on a moving body such as an automobile or a motorcycle.

  FIG. 2 is a block diagram illustrating a typical configuration of the information processing terminal 20. As shown in the figure, the information processing terminal 20 includes an input unit 100 that receives input from a user, a wireless communication unit 110 that enables wireless data communication with the outside, and a position detection unit that detects the current position of the information processing terminal. 120, display control unit 130 for displaying image data on a display, audio output unit 140 for outputting sound from a speaker, media playback unit 150 for reproducing media data such as audio data and image data, control unit 160, application, etc. And a program memory 170 for storing various software and various programs, a data memory 180 for storing various data, and a bus 190 for connecting the respective units. Furthermore, although not shown here, an interface that enables wired data communication with other electronic devices can also be provided.

  As shown in FIG. 1, the wireless communication unit 110 establishes communication with the server 40 and other servers 40n via the wireless communication network 30, and further communicates with other electronic devices existing around the information processing terminal 20. Short-distance wireless communication may be established between them. When the information processing terminal 20 includes a GPS receiver that uses a GPS signal, the position detection unit 120 detects absolute position information such as the latitude and longitude of the information processing terminal using the GPS receiver. In addition to this, the position detection unit 120 acquires position information from a GPS receiver mounted on a vehicle, or acquires position information from a server or other information distribution device installed on a road surface. There may be.

  The media playback unit 150 has a function of playing back audio data and image data recorded on a CD, DVD, Blu-ray disc, memory medium, data memory 180, etc., and a function of receiving and playing back TV broadcasts and radio broadcasts. Further, the media playback unit 150 can play back the media data distributed from the server 40n via the wireless communication unit 110. The program memory 170 stores a program for controlling the wireless communication unit 110, a program for controlling the media playback unit 150, and other software programs for executing various applications such as a navigation function. The program stored in the program memory 170 is executed by the control unit 160.

  The data memory 180 stores various data. The data memory 180 includes a non-volatile storage medium (for example, a semiconductor memory or a hard disk) that stores data even when the power is turned off. In a preferred embodiment, the non-volatile storage medium stores data downloaded from the server by the wireless communication unit 110 and its history information. The history information includes identification information for identifying downloaded data, date and time of download, identification information for an application related to the download, and the like. For example, when a navigation function has been executed in the past, a route from the current location to the destination, map data downloaded at that time, and the like are stored. The data to be stored may be limited to a certain capacity or a certain period.

  FIG. 3 shows main functions included in the information processing terminal 20 of this embodiment. In a preferred embodiment, the information processing terminal 20 includes a navigation function 200, a media playback function 210, a call function 220, a data communication function 230, and the like. However, the functions listed here are examples, and the functions of the information processing terminal 20 are not limited to these.

  As is well known, the navigation function 200 searches for a route to a destination, guides the vehicle along the route, and guides a road map around the vehicle position. In a preferred embodiment, the information processing terminal 20 receives necessary road map data and road traffic information from the server 40 and uses them. However, the information processing terminal 20 may be provided with road map data of a relatively limited area, and may receive road map data exceeding the area from the server 40.

  Next, the operation of receiving road map data from the server 40 will be described. 4A is a schematic diagram in which road map data of a certain area is divided into rectangular leaf unit P, and FIG. 4B is a diagram in which the server 40 converts the road map data in the leaf unit into an information processing terminal. 20 shows an example of transmission to 20. Here, one figure leaf Z is represented by coordinates (X, Y). It is assumed that the route R to the destination G is set when the current position (or own vehicle position) of the information processing terminal 20 is in the leaf (1, 1).

  When the information on the current location of the information processing terminal 20 is transmitted to the server 40, in response to this, the server 40 transmits the road map data of the map leaf (1, 1) including the current location to the information processing terminal 20. . Next, when the destination G is input by the user at the information processing terminal 20, the information processing terminal 20 transmits information on the destination to the server 40, and the server 40 routes the route from the current location S to the destination G. R is searched, and information on the searched route R is transmitted to the information processing terminal 20. On the display of the information processing terminal 20, road map data corresponding to the map leaf (1, 1) and the route R are displayed. Thereafter, guidance based on the route R is performed as the vehicle travels. In addition, road traffic information including guidance information such as intersections, the latest traffic jam information, traffic regulation information, and the like is also transmitted from the server 40 together with the leaf data or individually.

  The information processing terminal 20 monitors the position of the vehicle, and when the vehicle position approaches the boundary of the leaf (1, 1), the server 40 receives the next leaf (1, 2) or (2, 2). The server 40 transmits the road map data of the designated figure to the information processing terminal 20. The information processing terminal 20 receives the transmitted road map data, accumulates it in the data memory 180, and prepares for the display of the next road map data. In addition, although the example which requests | requires the delivery of road map data per rectangular figure leaf Z was shown here, the size of the road map data delivered, a shape, etc. are not limited to this, The request for the distribution of the road map data may simply convey the current location information to the server 40.

  The media playback function 210 (see FIG. 3) plays back music data and image data, and outputs images and sounds from the display control unit 130 and the audio output unit 140. The media playback function 210 can be activated simultaneously with the navigation function 200. In this case, the navigation function 200 is processed in the background, and necessary information such as intersection guidance can be displayed by voice or image by interruption. The call function 220 establishes a call with another mobile phone or smartphone. The data communication function 230 performs various controls when the information processing terminal 20 performs data communication via the wireless communication unit 110. In particular, in this embodiment, when the navigation function 200 or the like is executed and data is received from the outside wirelessly, data communication control is performed so as to avoid or reduce roaming as much as possible. Here, roaming is a service that allows the service of a contracted telecommunications carrier to be received using the facilities of other affiliated businesses even outside the service range of the business operator.

  FIG. 5 is a functional block diagram of a configuration included in the data communication function 230 according to the present embodiment. The roaming automatic switching setting unit 300 holds a user setting as to whether or not to automatically switch to data communication by roaming when roaming outside the range of the communication service occurs. The roaming area information holding unit 310 holds area information for specifying an area of a communication service with which the information processing terminal 20 has contracted, or area information for specifying an area where roaming occurs. Based on the area information held by the roaming area information holding unit 310, the roaming reception determination unit 320 determines whether the information processing terminal 20 is currently receiving data by roaming or, if received, reception by roaming. It is determined whether or not. Based on the area information held by the roaming area information holding unit 310, the roaming occurrence determination unit 330 determines whether roaming will occur in the future when the vehicle travels according to the route R. The preceding data reception time estimation unit 340 estimates the reception time of the preceding data that will be required for roaming when the roaming occurrence determination unit 330 determines that roaming occurs. The preceding data reception start position prediction unit 350 predicts a position at which reception of the preceding data starts based on the estimated preceding data reception time. The download control unit 360 controls reception of the preceding data according to the reception start position predicted by the preceding data reception start position prediction unit 350.

  Next, the data reception operation when the navigation function is executed by the information processing terminal of this embodiment will be described with reference to the flowchart of FIG. In this example, it is assumed that the current position of the information processing terminal 20 is within the communication service range of the information processing terminal.

  The navigation function 200 is executed in the information processing terminal 20, and the route to the destination is set by the server 40 as described above (S101). Thereafter, the navigation function 200 provides travel guidance as the vehicle travels. With the execution of the navigation function 200, the data communication function 230 is also started to operate, and the data communication function 230 checks whether or not the setting information of the roaming automatic switching setting unit 300 is on (S102). If it is not on, the flow ends. On the other hand, if the automatic switching is on, the area information is read from the roaming area information holding unit 310 (S103). Next, the roaming occurrence determination unit 330 compares the information on the route R to the destination with the read area information, and determines whether roaming occurs on the route R (S104). If roaming does not occur, the flow ends. On the other hand, when it is determined that roaming occurs, the reception time of the preceding data is estimated by the preceding data reception time estimation unit 340 (S105).

  Here, the reception time estimation of the preceding data will be described. FIG. 7 is a diagram schematically showing the relationship between the reception time Tb of the preceding data and the reception start position P of the preceding data when roaming occurs on the route R. In this example, it is assumed that the route R continues from the country A (domestic) to the country B, and international roaming occurs when the border Q between the country A and the country B is crossed. In the example illustrated in FIG. 7, the roaming area information holding unit 310 holds, for example, position information corresponding to the boundary Q between country A and country B as area information in which roaming occurs. The roaming occurrence determination unit 330 determines that roaming does not occur if the route R converges in A country, and if roaming occurs if the route R extends beyond the boundary Q to B country. judge. If the vehicle travels along the route R to the destination G, the section from the boundary Q to the destination G receives data by roaming. In this specification, data that needs to be received outside the range of communication services such as roaming is referred to as preceding data, and a travel distance from the boundary Q to the destination G is referred to as a roaming distance.

  The preceding data reception time estimation unit 340 estimates the reception time Tb of the preceding data required during traveling from the boundary Q to the destination G. The preceding data here is data required in the navigation function 200, for example, road map data and road traffic information in units of leaves as shown in FIG.

  FIG. 8 is a flow for explaining a method for estimating the reception time of the preceding data. First, the roaming distance along the road from the boundary Q to the destination G is calculated (S201). The route R is a set of links (road data) and intersection nodes. Since the link and intersection nodes include coordinate data, the start point of the node close to the boundary Q is extracted with reference to this. In addition, by extracting the end point of the link of the destination G and calculating the total link distance between them, a roaming distance can be obtained.

  Next, the capacity W of the preceding data is estimated based on the roaming distance from the boundary Q to the destination G (S202). The capacity W of the preceding data is proportional to the roaming distance, and may simply be set as the capacity W of the preceding data = the roaming distance × α. α is a constant obtained from an empirical rule or from practical use. Alternatively, as shown in FIG. 4, the capacity W of the preceding data may be calculated by estimating the number of leaves to be received from the roaming distance. Next, the reception time Tb of the preceding data is estimated (S203). For example, the reception time Tb can be calculated by dividing the preceding data capacity W by the data communication speed of the wireless communication unit 110. The data communication speed may be a value set in the wireless communication unit 110, or when the data communication speed varies, the average of the data communication speed over the most recent predetermined period may be referred to.

  When the reception time Tb of the preceding data is estimated, the process returns to the flow of FIG. 6 again, and the preceding data reception start position prediction unit 350 predicts and determines the position at which the reception of the preceding data starts (S106). The preceding data is received before roaming occurs, but since the preceding data includes information such as real-time traffic jam information and traffic regulation information, the preceding data is immediately before roaming as much as possible. It is desirable that reception is completed in Thereby, the latest road traffic information can be presented while traveling in the roaming area.

  The preceding data reception start position prediction unit 350 starts receiving the preceding data from a position where the previously estimated preceding data reception time Tb can be secured. For this reason, the reception start position P is determined so that the period Ta from the reception start time to the roaming occurrence time satisfies Ta> Tb (see FIG. 7). Here, Ta = Tb + β, and β is set so as to include the reception time of road map data and road traffic information required when traveling from the reception start position P to the boundary Q. The reception start position P is determined based on this period Ta. For example, the reception start position P can be calculated from the product of the period Ta to the speed information set for the link of the route R or the actual speed information of the own vehicle.

  Next, when the reception start position P is determined, the download control unit 360 monitors whether or not the current position has reached the reception start position (S107). Is started (S108). The download control unit 360 receives the road map data required during the current traveling, sews the intervals between the receptions, transmits a request for transmitting the preceding data to the server 40, and receives the preceding data from the server 40. . Thus, before the occurrence of roaming, reception of the necessary preceding data is completed (S109) and stored in the data memory 180.

  Next, the roaming reception determination unit 320 monitors whether the reception by the information processing terminal 20 is roaming (S110). This monitoring is performed by comparing the current position of the information processing terminal 20 with the area information read from the roaming area information holding unit 310. If it is determined that the roaming has been received, the download control unit 360 stops receiving the road map data from the server 40 by the wireless communication unit 110 (S111), and the navigation function 200 is stored in the data memory 180. The preceding data is used (S112), and guidance based on the route R is performed. Thereafter, when the roaming reception determination unit 320 determines that the roaming has been canceled, the download control unit 360 resumes reception of road map data by the wireless communication unit 110 (S114).

  As described above, according to the present embodiment, when it is determined that roaming will occur in future driving, the preceding data is downloaded before roaming occurs, so that a high data communication fee due to roaming is reduced. can do. Further, since the preceding data is downloaded as soon as possible before roaming, the latest road traffic information as much as possible can be presented to the user. In addition, when roaming occurs, data reception is automatically stopped, and when roaming is canceled, data reception is automatically resumed, so expensive data calls by roaming without the user's awareness It is possible to prevent a fee from being generated.

  FIG. 9 compares the case where the preceding data is prefetched when roaming occurs when the navigation function is executed by the mobile phone and the case where the preceding data is not read. As an example, it is assumed that 100 km out of the total distance of 200 km travels abroad (roaming). The communication fee is 0.05 (Euro) / Mbyte for domestic use and 0.80 / Mbyte for roaming. The data amount per 1 km traveling is 1 MB. As shown in FIG. 9, the communication fee can be reduced by 75.00 (euro).

  Next, a modification of the present embodiment will be described. In the above-described embodiment, the road map data of the leaf that overlaps with the route R is received as the preceding data. However, the road map data in a range larger than the range of the route R may be received. This is because it is assumed that the user travels off route R in an area where roaming occurs. For example, as shown in FIG. 10, in an area where roaming occurs, road map data normally received as preceding data is map leaves (3, 3), (4, 3), (5 3). However, in order to give this a certain margin, the leaves (3, 2), (4, 2), (5) adjacent to the leaves (3, 3), (4, 3), (5, 3). , 2) and / or (3, 4), (4, 4), (5, 4) can also be included in the preceding data. If the road map data of the adjacent figure is included in the preceding data, the capacity W1 of the preceding data is W1> W, and accordingly, the reception time Tb and the reception start position P are also changed accordingly.

  Next, a second embodiment of the present invention will be described with reference to the flow of FIG. If the information processing terminal 20 is determined to be in the roaming reception state by the roaming reception determination unit 320 during traveling (S301), the download control unit 360 refers to the history information stored in the data memory 180, and the like. It is checked whether or not data corresponding to the road traffic data is stored in the past (S302). If so, the reception of the road map data is stopped (S303), and the stored past Is read from the data memory 180 and used for navigation (S304). For example, this is effective when the same or similar route is set in the past and road map data acquired at that time is accumulated.

  On the other hand, if the corresponding data is not accumulated, the user is notified that roaming reception is to be performed (S305), and if the user permits roaming reception (S306), road map data is received by roaming. (S307) This is used in navigation. As described above, according to the second embodiment, when roaming reception is performed, billing due to roaming can be avoided by using road map data accumulated in the past. Further, even when there is no accumulated data, it is possible to prevent roaming reception without the user's knowledge.

  In the above-described embodiment, an example in which a roaming state does not occur when the destination route is set is shown. However, if the roaming is in progress when setting the destination route, The road map data is not downloaded as much as possible based on whether or not accumulated data can be used, and the download is resumed when roaming is canceled. In addition, when roaming occurs, it is desirable to notify the user to that effect so that the user can finally select whether or not to receive by roaming.

  Next, a third embodiment of the present invention will be described. In the third embodiment, the navigation function 200 and the media playback unit 150 are executed simultaneously. The media playback unit 150 plays back music data or image data downloaded from the server 40, and the navigation function is processed in the background. The

  FIG. 12 is a flowchart for explaining a data receiving operation according to the third embodiment. First, the data communication function 230, when the media playback unit 150 recognizes that the media data is being played back (S401), extracts identification information of the media data being played back (S402). For example, if a movie or music is being played, the title information is extracted. Next, the data communication function 230 determines whether or not preceding data is generated in the reproduced media data (S403). That is, whether or not media data that would be necessary due to roaming is generated. For example, when a movie is being played, Td is the time Td required to receive data not yet downloaded for the movie, and Ts is the travel time from the vehicle position to the boundary Q where roaming occurs. If> Ts, it is determined that preceding data is generated.

  When it is determined that the preceding data is generated, the capacity W of the preceding data is estimated (S404), and reception of the preceding data is started (S405). In this case, if the capacity W of the preceding data is larger than the memory space allocated for downloading the preceding data, the memory space may be expanded or stored in another memory space. In addition, since media data does not necessarily include real-time information like road traffic information, media data as preceding data does not determine the reception start position P and can immediately start receiving data. it can. However, as in the first embodiment, it does not prevent the reception start position P from being determined by estimating the reception time Tb of the preceding data from the capacity W of the preceding data.

  The download control unit 360 intermittently downloads road map data (see FIG. 4) in units of map leaves that is required during traveling with changes in the vehicle position. The media data as the preceding data is received. Thus, before the roaming occurs, the media data is received and stored in the data memory (S406). When it is determined that roaming occurs (S407), data reception by roaming is stopped (S408).

  As described above, according to the third embodiment, it is possible to reduce the data communication fee by enabling the media data being played back to be received in advance regardless of the roaming service. In the third embodiment, road map data and road traffic information as preceding data in the first embodiment may also be received.

  The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the specific embodiment, and various modifications can be made within the scope of the present invention described in the claims. Deformation / change is possible.

10: Information processing system 20: Information processing terminal 30: Wireless communication network 32: Base station 34: Network 40: Server 200: Navigation function 210: Media playback function 220: Call function 230: Data communication function G: Destination P: Reception Start position Q: Boundary R: Route S: Present location Z: Map leaf Tb: Reception time of preceding data

Claims (20)

An information processing terminal including a navigation function,
A communication means for enabling data communication with the outside;
Processing means capable of executing data processing using at least data acquired by the communication means;
Storage means capable of storing at least data acquired by the communication means;
Estimating means for estimating whether it is necessary to receive data outside the range of the communication service of the information processing terminal based on route information to the destination set by the navigation function;
If it is determined by the estimation means that it is necessary to receive data outside the range of the communication service, the preceding data that would be necessary while traveling outside the range of the communication service is traveling within the range of the communication service. Control means for controlling the communication means to receive on
An information processing terminal having The control means includes an estimation means for estimating a reception time required for reception of preceding data that would be necessary while traveling outside the range of the communication service, and the control means is configured to receive the reception time estimated by the estimation means. The information processing terminal according to claim 1, wherein the communication unit starts receiving the preceding data based on the information. The control means predicts an arrival time to reach outside the range of the communication service based on the speed information of the own vehicle or the speed information set in the route information, and the control means includes the estimated reception time and the The information processing terminal according to claim 1, wherein the information processing terminal compares the arrival time and determines a position where reception of the preceding data is started based on the comparison result. The communication means makes a transmission request to the outside, receives data transmitted from the outside in response to the transmission request, and the control means transmits the preceding data while traveling within the range of the communication service. The information processing terminal according to any one of claims 1 to 3, wherein a transmission request for reception is transmitted to the communication unit. The information processing terminal according to claim 2, wherein the estimation unit estimates a reception time of the preceding data based on a distance from a position outside the range of the communication service to the destination. The information processing terminal according to claim 1, wherein when the processing unit is executing a navigation function, the communication unit receives map data as the preceding data. The information processing terminal according to claim 1, wherein the communication unit receives road traffic information as the preceding data. The communication means receives the media data being reproduced as the preceding data when the processing means is reproducing the media data received from the outside via the communication means. The information processing terminal according to one. The information processing terminal further includes roaming determination means for determining whether or not the data is received by a roaming service outside the range of the communication service,
The information processing terminal according to any one of claims 1 to 8, wherein when the control unit determines that the data is received by the roaming service, the control unit stops the data reception by the communication unit. When it is determined that the data is received by the roaming service when the route to the destination is set by the navigation function, the control unit uses the communication unit until the roaming service is canceled. The information processing terminal according to claim 1, wherein reception of data is stopped. The information processing terminal further includes storage means for storing area information for identifying the area of the communication service,
The information processing terminal according to claim 1, wherein the determination unit and the roaming determination unit make a determination based on the area information. An information processing terminal according to any one of claims 1 to 11,
An electronic device connected to the information processing terminal via wireless communication and transmitting data to the information processing terminal;
An information processing system. Communication means for enabling data communication with the outside; processing means capable of executing data processing using at least data acquired by the communication means; and storage means capable of storing at least data acquired by the communication means; A data reception program executed by an information processing terminal having
Executing a navigation function by the processing means;
Estimating whether it is necessary to receive data outside the communication service range of the information processing terminal based on the route information searched by executing the navigation function;
If it is estimated that data reception is necessary outside the range of the communication service, the preceding data that would be received while traveling outside the range of the communication service is transferred while traveling within the range of the communication service. Controlling the communication means to receive;
A data receiving program. The controlling step includes a step of estimating a reception time required for reception of preceding data that may be necessary while traveling outside the range of the communication service, and the controlling step includes the reception estimated by the estimating step. 14. The data reception program according to claim 13, wherein the communication unit starts receiving the preceding data based on time. The step of controlling predicts an arrival time that reaches outside the range of the communication service based on the speed information of the vehicle or the speed information set in the route information, and the step of controlling includes the estimated reception time. The data reception program according to claim 13 or 14, wherein a position at which reception of the preceding data is started is determined based on a comparison result. The communication means makes a transmission request to the outside, receives data transmitted from the outside in response to the transmission request, and the controlling step includes the preceding data while traveling within the range of the communication service. The data reception program according to claim 13, wherein a transmission request for receiving the data is transmitted to the communication unit. Communication means for enabling data communication with the outside; processing means capable of executing data processing using at least data acquired by the communication means; and storage means capable of storing at least data acquired by the communication means; A data receiving method in an information processing terminal having:
Executing a navigation function by the processing means;
Estimating whether it is necessary to receive data outside the communication service range of the information processing terminal based on the route information searched by executing the navigation function;
If it is estimated that data reception is necessary outside the range of the communication service, the preceding data that would be necessary while traveling outside the range of the communication service is received while traveling within the range of the communication service. Controlling the communication means as follows:
A data receiving method. The controlling step includes a step of estimating a reception time required for reception of preceding data that may be necessary while traveling outside the range of the communication service, and the controlling step includes the reception estimated by the estimating step. The data receiving method according to claim 17, wherein the communication unit is caused to start receiving the preceding data based on time. The step of controlling predicts an arrival time that reaches outside the range of the communication service based on the speed information of the vehicle or the speed information set in the route information, and the step of controlling includes the estimated reception time. The data reception method according to claim 17 or 18, wherein a position at which reception of the preceding data is started is determined based on a comparison result. The communication means makes a transmission request to the outside, receives data transmitted from the outside in response to the transmission request, and the controlling step includes the preceding data while traveling within the range of the communication service. The data reception method according to claim 17, wherein a transmission request for receiving the data is transmitted to the communication unit.

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