WO2007046339A1

WO2007046339A1 - Communication terminal, communication server, data transmitting method, data receiving method, data transmitting program, data receiving program and recording medium

Info

Publication number: WO2007046339A1
Application number: PCT/JP2006/320582
Authority: WO
Inventors: Hiroaki Shibasaki
Original assignee: Pioneer Corporation
Priority date: 2005-10-21
Filing date: 2006-10-16
Publication date: 2007-04-26

Abstract

A first communication terminal (110) and a second communication terminal (120) are communication terminals in a communication network composed of a plurality of communication terminals which can mutually communicate. The first communication terminal (110) is provided with an acquiring section (111), a distributing section (112), a receiving section (113), a transmitting section (114) and a judging section (115). The acquiring section (111) acquires data relating to a current location. The distributing section (112) distributes location information to other communication terminals including a second communication terminal (120). The receiving section (113) receives a data transmission request signal as a result of the location information distribution by the distributing section (112). The transmitting section (114) transmits the data to the second communication terminal (120) which has transmitted the transmission request signal when the transmission request signal is received by the receiving section (113). The judging section (115) judges whether to transmit the data, based on a time passed from a time the data is distributed by the distributing section (112) and whether the transmission request signal has been received or not by the receiving section (113).

Description

Specification

Communication terminal, communication server, data transmission method, data reception method, data transmission program, data reception program, and recording medium

Technical field

The present invention relates to a communication terminal, a communication server, a data transmission method, a data reception method, a data transmission program, a data reception program, and a recording medium that are used for data transmission / reception between users. However, the use of the present invention is not limited to the communication terminal, communication server, data transmission method, data reception method, data transmission program, data reception program, and recording medium described above.

Background art

[0002] Conventionally, due to the development of network infrastructure and the spread of information and communication terminals, data (information) has been exchanged between individual users via the network, and a community sharing the same information has been formed. And

[0003] In such a community, for example, other mobile terminals receive signals transmitted from mobile terminals within the short-range wireless communication range by the short-range wireless communication unit, and exchange necessary data. The received data is displayed on the display and prompts you to move to the next phase. Next, a connection is made to a server on the wide area network by the wide area wireless communication unit, confirming the identity of the other party and prompting the transition to the next phase. At this point, personal detail data is exchanged between the terminals (see, for example, Patent Document 1 below).

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[0004] Patent Document 1: JP 2001-333451 A

Disclosure of the invention

Problems to be solved by the invention

[0005] However, according to the above-described conventional technology, there is a problem that it is impossible to know whether the information held by the communication partner is the information that the self needs. In particular, when there are a large number of communicable parties, an example is the problem that it is necessary to efficiently determine which communication partner power information is to be acquired. [0006] Further, even if the current position of the communication partner can be specified to some extent, the information held by the communication partner is not necessarily related to the location. In particular, in communications using mobile communication terminals, the problem is that the location of the information is an important factor in determining whether or not it is capable of acquiring information. It is done.

[0007] Further, as an example, there is a problem that information held by the communication partner cannot know the time (time) when it was generated. In particular, for information that changes from moment to moment, information that does not have the information value of the information that has passed since it was created, and when it was created, whether it was the ability to acquire information. An example is the problem of being an important factor in judging.

Means for solving the problem

[0008] In order to solve the above-described problems and achieve the object, a communication terminal according to the invention of claim 1 is a communication terminal in a communication network having a plurality of communication terminals capable of communicating with each other, and the communication terminal An acquisition means for acquiring data relating to the current location of the terminal; a delivery means for delivering the location information of the current location to a communication terminal other than the communication terminal; and a result of the location information being delivered by the delivery means, A receiving unit that receives a transmission request signal for data acquired by the acquiring unit from the other communication terminal; and a communication terminal that has transmitted the transmission request signal when the transmission request signal is received by the receiving unit. Transmission means for transmitting the data.

[0009] The communication terminal according to the invention of claim 5 is a communication terminal in a communication network composed of a plurality of communication terminals capable of communicating with each other, and is a current point of a communication terminal other than the communication terminal. A first receiving means for receiving the spot information; an output means for outputting the spot information received by the first receiving means; and when the spot information is output by the output means, the other communication terminal An input means for receiving an input of a data transmission request relating to the current location, a transmission means for transmitting the data transmission request signal when the input request is input by the input means, and the transmission means And a second receiving means for receiving the data from the other communication terminal as a result of the transmission request signal being transmitted. [0010] Further, the communication server according to the invention of claim 8 is a communication server capable of mutual communication with a plurality of communication terminals, and one communication having data relating to a current location among the plurality of communication terminals. The first receiving means for receiving the location information and the data of the current location of the one communication terminal from the terminal, and the location information received by the first receiving means are communicated with other communication other than the one communication terminal. A distribution unit that distributes to the terminal; and a second transmission unit that receives a transmission request signal of data received by the first reception unit from the other communication terminal as a result of the distribution of the point information by the distribution unit. And a transmission means for transmitting the data to the communication terminal that has transmitted the transmission request signal when the transmission request signal is received by the second reception means.

[0011] Further, the data transmission method according to the invention of claim 9 is a data transmission method using a communication terminal in a communication network having a plurality of communication terminals capable of communicating with each other, wherein the current location of the communication terminal An acquisition step of acquiring data regarding, a distribution step of distributing point information of the current location to communication terminals other than the communication terminal, and a result of the distribution of the point information by the distribution step, A reception step of receiving a transmission request signal of the acquired data from the other communication terminal, and when the transmission request signal is received by the reception step, the data is transmitted to the communication terminal that has transmitted the transmission request signal. And a transmission step of transmitting.

[0012] Further, the data receiving method according to the invention of claim 10 is a data receiving method using a communication terminal in a communication network having a plurality of communication terminals capable of communicating with each other. A first receiving step for receiving point information of the current point of another communication terminal, an output step for outputting the point information received in the first receiving step, and the point information by the output step. When the data is output, an input process for receiving an input of a data transmission request regarding the current location of the other communication terminal, and when the transmission request is input by the input process, the data transmission request signal is A transmission step of transmitting, and a second reception step of receiving the data from the other communication terminal as a result of transmission of the transmission request signal by the transmission step.

[0013] The data transmission method according to the invention of claim 11 is a data transmission method using a communication server capable of mutual communication with a plurality of communication terminals, wherein the data transmission method includes: The first reception step of receiving the location information of the current location of the one communication terminal and the data from the one communication terminal having data on the current location, and the location information received by the first reception step A distribution step of distributing to other communication terminals other than one communication terminal, and a result of the distribution of the point information by the distribution step, a transmission request signal of data received by the first reception step A second reception step for receiving from the communication terminal; and a transmission step for transmitting the data to the communication terminal that has transmitted the transmission request signal when the transmission request signal is received in the second reception step. It is characterized by that.

[0014] Furthermore, a data transmission program according to the invention of claim 12 causes a computer to execute the data transmission method according to claim 9 or 11.

[0015] Further, a data receiving program according to the invention of claim 13 causes a computer to execute the data receiving method of claim 10.

[0016] Further, a recording medium according to the invention of claim 14 is characterized by being readable by a computer recording the data transmission program according to claim 12.

[0017] A recording medium according to the invention of claim 15 is readable by a computer recording the data receiving program according to claim 13.

Brief Description of Drawings

[0018] FIG. 1 is a block diagram showing a functional configuration of a data transmission / reception system according to an embodiment.

FIG. 2 is a flowchart showing a procedure of data transmission processing of the first communication terminal.

FIG. 3 is a flowchart showing a procedure of data reception processing of the second communication terminal.

FIG. 4 is a block diagram showing a functional configuration of a communication server.

FIG. 5 is a flowchart showing a procedure of data transmission processing of the communication server.

FIG. 6 is an explanatory diagram showing a system configuration of a data transmission / reception system according to the embodiment.

FIG. 7 is a block diagram showing a hardware configuration of the navigation device.

[FIG. 8] FIG. 8 is a flowchart showing a procedure of data transmission processing of a navigation device for a vehicle that transmits data. FIG. 9 is a flowchart showing a procedure of data reception processing of the navigation device for a vehicle that receives data.

FIG. 10 is an explanatory diagram showing an example of a screen display of a data transmission request notification.

Explanation of symbols

[0019] 100 data transmission / reception system

110 First communication terminal

111 Acquisition Department

112 Distribution Department

113 Receiver

114 Transmitter

115 Judgment part

120 Second communication terminal

121 First receiver

122 Output section

123 Input section

124 Transmitter

125 Second receiver

BEST MODE FOR CARRYING OUT THE INVENTION

[0020] Exemplary embodiments of a communication terminal, a communication server, a data transmission method, a data reception method, a data transmission program, a data reception program, and a recording medium according to the present invention will be described below with reference to the accompanying drawings. This will be described in detail.

[0021] (Embodiment)

First, the functional configuration of the data transmission / reception system that is relevant to the embodiment will be described. FIG. 1 is a block diagram showing a functional configuration of a data transmission / reception system according to the embodiment. In FIG. 1, a data transmission / reception system 100 includes a first communication terminal 110 that transmits information and a second communication terminal 120 that receives information. The first communication terminal 110 and the second communication terminal 120 are communication terminals in a communication network having a plurality of communication terminals capable of communicating with each other. The first communication terminal 110 includes an acquisition unit 111, a distribution unit 112, a reception unit 113, a transmission unit 114, and a determination unit 115. The acquisition unit 111 acquires data relating to the current location of the first communication terminal 110. The data relating to the current location is, for example, information such as traffic conditions, scenery, and topics at the current location, and the data format may be any text, image, video, audio, or the like.

Distribution unit 112 distributes the location information of the current location to communication terminals other than first communication terminal 110 (including second communication terminal 120). The location information of the current location is, for example, latitude and longitude information of the current location of the first communication terminal 110. For example, the distribution unit 112 specifies the current position of the first communication terminal 110 based on, for example, a GPS signal received by the GPS receiver.

[0024] Further, the distribution unit 112 may further distribute information specifying data to other communication terminals. The information specifying data is, for example, information such as data format and content, title, and sender name. Further, the distribution unit 112 may distribute the time when the data is acquired to another communication terminal.

[0025] Specifically, the distribution unit 112 transmits, for example, point information using a broadcast address for transmitting information to all communication terminals in the communication network. In addition, the distribution unit 112 transmits the point information only to the communication terminal located within the communication area of the specific base station, specifies the communication address of the second communication terminal 120, and the like, thereby allowing other communication terminals to It is also possible to distribute point information only to a limited number.

[0026] Receiving unit 113 includes a transmission request signal for requesting transmission of data acquired by acquisition unit 111 as a result of distribution of point information by distribution unit 112, including second communication terminal 120. Received from other communication terminals.

[0027] When the transmission request signal is received by the reception unit 113, the transmission unit 114 transmits data to other communication terminals including the second communication terminal 120 that has transmitted the transmission request signal. In addition, the transmission unit 114 includes other communication terminals including the second communication terminal 120 that has transmitted the transmission request signal based on the determination result of the determination unit 115, when the determination unit 115 described below makes a determination. Send data to.

[0028] Judgment unit 115 includes an elapsed time from distribution by distribution unit 112 and transmission by reception unit 113. Whether to transmit data is determined based on whether or not the request signal is received. Judgment part

Specifically, 115 determines that the data is not transmitted even if the transmission request signal is received after the distribution power by the distribution unit 112 has also exceeded a predetermined time, for example. If the data has an expiration date, it is determined whether the transmission request is within the expiration date, and whether data is to be transmitted.

Next, a functional configuration of second communication terminal 120 will be described. The second communication terminal 120 includes a first reception unit 121, an output unit 122, an input unit 123, a transmission unit 124, and a second reception unit 125.

[0030] The first receiving unit 121 receives the location information of the current location of the first communication terminal 110, which is a communication terminal other than the second communication terminal 120. Further, the first receiving unit 121 may receive information specifying data from the first communication terminal 110. Further, the first receiving unit 121 receives the time when the data was acquired from the first communication terminal 110.

[0031] The output unit 122 outputs the spot information received by the first receiving unit 121. The output unit 122 displays, for example, a screen where the point information is drawn on a map, displays the point information in text format on the screen, and outputs the sound. Further, the output unit 122 outputs the received information when the first receiving unit 121 receives the information specifying the data or the time when the data was received.

[0032] When the location information is output by the output unit 122, the input unit 123 receives an input of a data transmission request regarding the current location of the first communication terminal 110, which is another communication terminal. Specifically, the input unit 123 accepts a data transmission request made by the user based on the information output by the output unit 122, for example. Specifically, the input unit 123 receives an input of a transmission request using, for example, an operation button touch panel, a voice input device, or the like.

Transmitter 124 transmits a data transmission request signal when a transmission request is input by input unit 123. Further, as a result of the transmission request signal being transmitted by transmission section 124, second reception section 125 receives data from first communication terminal 110 that is another communication terminal. Next, the procedure of data transmission / reception processing by the data transmission / reception system 100 will be described. The following description is divided into data transmission processing of the first communication terminal 110 that performs data transmission and data reception processing of the second communication terminal 120 that performs data reception. FIG. 2 is a flowchart showing a procedure of data transmission processing of the first communication terminal.

In the flowchart of FIG. 2, first communication terminal 110 first acquires data relating to the current location by acquisition unit 111 (step S201). Next, the distribution unit 112 distributes the location information of the current location to other communication terminals including the second communication terminal 120 (step S202). At the same time, information specifying the data and the time when the data was acquired may be distributed.

[0036] Then, the receiving unit 113 waits until the other communication terminal power including the second communication terminal 120 receives the data transmission request signal (step S203: No loop). When the data transmission request signal is received (step S203: Yes), the data is transmitted to the communication terminal that transmitted the transmission request signal (step S204), and the processing according to this flowchart ends. At this time, it may be determined whether or not it is possible to transmit data based on the elapsed time from distribution by distribution section 112 and whether or not reception request signal is received by reception section 113.

[0037] Next, processing performed by the second communication terminal 120 will be described. FIG. 3 is a flowchart showing a procedure of data reception processing of the second communication terminal. In the flowchart of FIG. 3, the second communication terminal 120 first waits until the first receiving unit 121 receives the point information of the first communication terminal 110 (step S301: No loop). . When the point information is received (step S301: Yes), the output unit 122 outputs the point information received in step S301 (step S302).

Then, it is determined whether or not a data transmission request has been input from the user by the input unit 123 (step S303). When a data transmission request is input (step S303: Yes), a data transmission request signal is transmitted to the first communication terminal 110 (step S304). On the other hand, when the data transmission request is not input (step S303: No), the process returns to step S301 and the subsequent processing is repeated.

[0039] In step S304, a data transmission request signal is transmitted to first communication terminal 110. In this case, the process waits until data is received by the second receiving unit 125 (step S305: No loop). When data is received (step S305: Yes), the processing according to this flowchart ends.

[0040] As described above, according to the data transmission / reception system 100 according to the embodiment, it is acquired by the first communication terminal 110 in a communication network having a plurality of communication terminals capable of mutual communication. Data relating to the current position is transmitted to other communication terminals including the second communication terminal 120.

[0041] At that time, by distributing the point information of the first communication terminal 110, the first communication terminal 110 determines whether or not to request data transmission to the user of the other communication terminal. It is possible to determine whether the information held is the power necessary for the user. As a result, the users of the respective communication terminals can more accurately access the data they need.

[0042] Further, by distributing information specifying data and the time when the data was acquired, it is possible to more accurately determine whether or not to request data transmission to the user of another communication terminal. Can be made. For this reason, it is possible to appropriately acquire a large amount of information necessary for the user on the communication network.

[0043] Further, the data transmission deadline is determined by determining whether or not to transmit data based on the elapsed time of distribution power such as point information and the reception of the transmission request signal. This makes it possible to avoid distributing data whose information value fades over time to other communication terminals.

In the embodiment described above, the data acquired by first communication terminal 110 is transmitted directly to second communication terminal 120. On the other hand, the data acquired by the first communication terminal 110 may be transmitted to the second communication terminal 120 via the communication server. Thereby, for example, the communication volume and transmission / reception status of data can be centrally managed by the communication server.

[0045] Further, since direct data transmission / reception is not performed, personal information in which the communication addresses of the first communication terminal 110 and the second communication terminal 120 are not known to each other can be protected. In the following, the functional configuration and data transmission processing of the communication server in this case explain about.

FIG. 4 is a block diagram showing a functional configuration of the communication server. The communication server 400 is a communication server that can communicate with a plurality of communication terminals including the first communication terminal 110 and the second communication terminal 120, and includes the first reception unit 401, the distribution unit 402, and the second reception terminal. The unit 403 and the transmission unit 404 are configured.

[0047] The first receiving unit 401 receives point information of the current point of the first communication terminal 110 from one communication terminal (first communication terminal 110) having data regarding the current point among the plurality of communication terminals. And receive data. Further, the first receiving unit 401 may further receive information specifying data and the time when the data was acquired from the first communication terminal 110.

The distribution unit 402 distributes the point information received by the first reception unit 401 to other communication terminals (including the second communication terminal 120) other than the first communication terminal 110. The distribution unit 402 further distributes the information specifying the data and the time when the data was received, received by the first reception unit 401, to other communication terminals including the second communication terminal 120. As a matter of fact.

[0049] As a result of the distribution of the point information by the distribution unit 402, the second reception unit 403 transmits a data transmission request signal received by the first reception unit 401 to other communication including the second communication terminal 120. Receive from the terminal. Further, when the transmission request signal is received by the second reception unit 403, the transmission unit 404 transmits data to other communication terminals including the second communication terminal 120 that has transmitted the transmission request signal.

Next, the procedure of the data transmission process of communication Sano 00 will be described. FIG. 5 is a flowchart showing the data transmission processing procedure of the communication server. In the flowchart shown in FIG. 5, the first reception unit 401 waits until it receives point information and data from the first communication terminal 110 (step S501: No loop).

[0051] When the location information and data are received (step S501: Yes), the delivery unit 402 delivers the location information to other communication terminals including the second communication terminal 120 (step S502). Then, it is determined whether or not it has received a transmission request signal for other communication terminal power data including the second communication terminal 120 (step S503).

[0052] When a data transmission request signal is received (step S503: Yes), a transmission request signal is Data is transmitted to the transmitted communication terminal (step S504), and the processing according to this flowchart is terminated. At this time, it may be determined whether or not the data is transmitted based on the elapsed time from the distribution by the distribution unit 402 and the presence / absence of reception of the transmission request signal by the second reception unit 403. On the other hand, when a data transmission request is not received (step S5 03: No), the process returns to step S501 and the subsequent processing is repeated.

Even with the above configuration, the same effects as those of the data transmission / reception system 100 described above can be obtained, and further, the communication amount and the transmission / reception state of data can be centrally managed by the communication server 400. In addition, since direct data transmission / reception is not performed, personal information in which the communication addresses of the first communication terminal 110 and the second communication terminal 120 are not known to each other can be protected.

Example

Next, an example of the data transmission / reception system 100 that works on the above-described embodiment will be described. In the following embodiment, a case where the data transmission / reception system 100 is applied to a data transmission / reception system 600 using a navigation device mounted on a vehicle will be described.

First, the system configuration of the data transmission / reception system 600 according to the embodiment will be described. FIG. 6 is an explanatory diagram showing a system configuration of a data transmission / reception system according to the embodiment. In Fig. 6! /, Drive 610, 620 (620a to 620e) on the roads LI, L2 and drive!

Further, navigation devices 611 and 621 (621a to 621e) are mounted on the vehicles 610 and 620, respectively. The navigation devices 611 and 621 communicate with the roadside devices 630 (630a to 630c) installed on the side of the road on which the vehicles 610 and 620 run, respectively, and send and receive data.

[0057] The roadside devices 630a to 630c are each connected to a network, and the communication areas are areas A, B, and C indicated by dotted lines in FIG. The vehicles 610 and 620 that have entered the communication areas of the roadside devices 630a to 630c are connected to the network via the roadside devices 630a to 630c, and send and receive data. In addition to the illustration, the roadside machine 630 is installed so as to cover a point where the vehicles 610 and 620 can enter such as a road and a parking lot as a communication area. [0058] For each of the vehicles 610 and 620, an ID for identifying the own vehicle is uniquely assigned to each of the vehicles 610 and 620, for example, an IP address. This ID is used as a communication address in the data transmission / reception system 600, and the navigation devices 611 and 621 can transmit information to a specific vehicle 610 and 620 using the ID of the vehicle 610 and 620. The IDs of the vehicles 610 and 620 are stored in the navigation devices 611 and 621, respectively.

[0059] In addition, the navigation devices 611 and 621 can transmit information using a "broadcast address" that is a common address of the vehicles 610 and 620 in the communication area of all the roadside devices 630. . By using the broadcast address, data can be transmitted to unspecified vehicles 610, 620 even if the ID of each vehicle 610, 620 is not known. A broadcast address may be provided for each individual roadside machine 630. For example, when information is distributed using a broadcast address for the roadside machine 630a, the information is distributed to the vehicles 610 and 620 in the area A.

[0060] In Fig. 6, information is transmitted using the broadcast address for all vehicles 610 and 620 within the communication area of the roadside machine 630. However, the present invention is not limited to this. Sending information using the broadcast address including the vehicle. In other words, not only between vehicles in the communication area of Fig. 6, but also other vehicles that are outside the communication area of Fig. 6 and are traveling on roads other than Ll and L2, or outside the communication area of Fig. 6. The information may be transmitted using the broadcast address including other vehicles traveling far behind the vehicles 610, 620. As a result, information can be transmitted to unspecified vehicles in a wide range.

[0061] Further, an area for transmitting information may be designated and transmitted. As described above, when a broadcast address is provided in the roadside machine 630, the area can be designated by designating the roadside machine 630. This designation is naturally possible from a vehicle traveling on another road. When the vehicle power is also transmitted, for example, by specifying the roadside machine 630c, the information is distributed to the vehicles in the area C. Will be.

[0062] Passengers of the vehicles 610 and 620 can transmit information on the current position of the vehicle to other vehicles 610 and 620 via the network. What is current location information? For example, the topic is that traffic information such as the traffic around the current position of the vehicle and the scenery seen from the current position are beautiful.

[0063] On the other hand, passengers of other vehicles 610 and 620 determine whether or not the information to be transmitted is necessary and then determine whether or not to receive the transmission. For example, if there is information about vehicles 6 10, 620 near the current position of the vehicle, vehicles 610, 620 at the point where the vehicle is going to travel, or information on a field of interest, there is a possibility of receiving the transmission. High,.

As described above, the data transmission / reception system 600 transmits and receives information on the current position between the vehicles 610 and 620. As a result, information actually acquired at a specific location can be obtained by the vehicles 610 and 620 at other locations. Hereinafter, the vehicle that provides (sends) information will be described as the vehicle 610, and the vehicle that provides (receives) information will be described as the vehicle 620. You may do it.

[0065] (Hardware configuration of navigation devices 611 and 621)

Next, the hardware configuration of the navigation devices 611 and 621 will be described. FIG. 7 is a block diagram showing a hardware configuration of the navigation device. In FIG. 7, navigation devices 611 and 621 include a CPU 701, a ROM 702, a RAM 703, a magnetic disk drive 704, a magnetic disk 705, an optical disk drive 706, an optical disk 707, an audio IZF (interface) 708, A microphone 709, a speaker 710, an input device 711, a video IZF712, a display 713, a communication I / F714, and a GPS Resino 715 are provided. Each component 701 to 715 is connected by a bus 720.

First, the CPU 701 governs overall control of the navigation devices 611 and 621. The ROM 702 records programs such as a boot program, a communication program, a database creation program, and a data analysis program. The RAM 703 is used as a work queryer for the CPU 701.

The magnetic disk drive 704 controls reading and writing of data with respect to the magnetic disk 705 according to the control of the CPU 701. The magnetic disk 705 records data written under the control of the magnetic disk drive 704. As the magnetic disk 705, for example, HD (node disk) or FD (flexible disk) can be used. In addition, the optical disk drive 706 controls reading and writing of data from and to the optical disk 707 according to the control of the CPU 701. The optical disc 707 is a detachable recording medium from which data is read according to the control of the optical disc drive 706. The optical disk 707 can also use a writable recording medium. Further, the removable recording medium may be a power MO of the optical disc 707, a memory card, or the like.

The audio IZF 708 is connected to a microphone 709 for audio input and a speaker 710 for audio output. Audio received by the microphone 709 is AZD converted in the audio IZF708. In addition, sound is output from the speaker 710. Note that the sound input from the microphone 709 can be recorded on the magnetic disk 705 or the optical disk 707 as sound data.

[0070] The input device 711 includes a remote controller, a keyboard, a mouse, a touch panel, and the like, each having a plurality of keys for inputting characters, numerical values, various instructions, and the like. Further, the input device 711 includes a camera capable of shooting images and moving images (video). Images and moving images taken with the camera can be recorded on the magnetic disk 705 or optical disk 707 as image data and moving image data.

In addition, the video IZF 712 is connected to the display 713. Specifically, the video I / F 712 includes, for example, a graphic controller that controls the entire display 713, a buffer memory such as VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. Based on the output image data, it is constituted by a control IC or the like that controls the display 713.

[0072] Display 713 displays icons, cursors, menus, windows, or various data such as characters and images. As this display 713, for example, a CRT, a TFT liquid crystal display, a plasma display, or the like can be adopted.

Further, the communication IZF 714 is connected to a communication network via radio and functions as an interface between the navigation devices 611 and 621 and the CPU 701. The communication IZF 714 is further connected to a communication network such as the Internet via wireless, and also functions as an interface between the communication network and the CPU 701.

[0074] Communication networks include LANs, WANs, public line networks and mobile phone networks. Specifically, communication IZF714 is, for example, FM tuner, VICS (Vehicle Information and Communication System) Consists of Z-Beacon Resino, wireless navigation device, and other navigation devices, and acquires road traffic information such as traffic jams and traffic regulations that are distributed by the VICS Center. VICS is a registered trademark.

[0075] In addition, the GPS receiver 715 acquires information indicating the current position of the vehicles 610 and 620 (the current position of the navigation devices 611 and 621) using output values of GPS (Global Positioning System) and various sensors. To do. The information indicating the current position is information for specifying one point on the map information such as latitude and longitude.

[0076] (Data transmission / reception processing of data transmission / reception system 600)

Next, the procedure of data transmission / reception processing performed by the data transmission / reception system 600 will be described. Hereinafter, the processing performed by the navigation device 611 of the vehicle 610 that transmits data and the processing performed by the navigation device 621 of the vehicle 620 that receives data will be described separately.

FIG. 8 is a flowchart showing a data transmission processing procedure of the vehicle navigation apparatus that transmits data. In the flowchart of FIG. 8, the navigation device 611 acquires data relating to the current position of the host vehicle (step S801), adds the position information and time information, and stores them (step S802).

[0078] As described above, the data related to the current position includes traffic jam information, landscape images, and the like. This information may be generated by the navigation device 611, or may be generated by another terminal or the like. May be acquired via communication or a recording medium. In addition, the data to be acquired may be in any format such as text, sound, image, and moving image. At this time, if necessary, a plug-in for using the same format data in another navigation device 621 may be stored together with the data.

[0079] The reason why position information and time information are added in step S802 is that navigation device 611 is installed in vehicle 610 and its current position changes from moment to moment. The stored data can be sorted and selected based on the added location information and time information.

Next, navigation device 611 determines whether or not a data transmission request notification delivery instruction has been received (step S803). Specifically, the delivery instruction from the passenger of vehicle 610 It is determined whether or not there is an input. If there is a distribution instruction (step S803: Yes), the data transmission request notification is distributed to the navigation device 621 of the other vehicle 620 using the broadcast address (step S804). On the other hand, when there is no distribution instruction (step S803: No), the process returns to step S801 and the subsequent processing is repeated.

[0081] The data transmission request notification delivered in step S804 is sent to the data obtained in step S801 in addition to an intention to transmit to the other vehicle 620, as well as to the data desired to be transmitted. Contains information. For example, information about the data you want to send includes, for example, location information about the location where the data was acquired, time information about the time, data category (eg, traffic jam information, tourism information, etc.), data title, It includes the presence / absence of detailed information about data (for example, thumbnails if the data is images) and the type of data (for example, text, images, video, audio, etc.).

[0082] Further, a transmission time limit may be set for the data. For example, information that fluctuates over time, such as traffic jam information, has no information value even if information that is too old is transmitted. For this reason, for example, after sending a data transmission request notification, set to not send data after a certain period of time. On the other hand, you may be able to set “permanent transmission” for data that was sent regularly, without a specific deadline, such as a beautiful sunset image.

[0083] In addition, by using a broadcast address transmitted only to a vehicle 620 in a specific base station, rather than using a broadcast address transmitted to all vehicles 620, a data transmission request notification only within a specific area. May be delivered. In addition, for example, a broadcast address that can specify a group of acquaintances or a group having a terminal that can receive a specific service may be used.

Returning to the description of FIG. 8, the navigation apparatus 611 waits until it receives a data distribution request signal from the navigation apparatus 621 of the other vehicle 620 (step S805: No loop), and distributes data. If the request signal has been received (step S805: Yes), data is transmitted to the navigation device 621 of the vehicle 620 that has transmitted the distribution request signal (step S806), and the processing according to this flowchart is terminated.

[0085] Note that if the received distribution request signal includes a request that the data further narrowed down to a specific area is desired, the data may be narrowed down to the corresponding area. Also, de If there is a plug-in necessary to use the data, it is transmitted together with the data.

[0086] Next, processing performed by the navigation device 621 of the vehicle 620 that receives information will be described. FIG. 9 is a flowchart showing a procedure of data reception processing of the vehicle navigation apparatus that receives data. In the flowchart of FIG. 9, the navigation apparatus 621 first waits until it receives a data transmission request notification from the navigation apparatus 611 of the vehicle 610 (step S 901: No loop).

[0087] When the data transmission request notification is received (step S901: Yes), the received notification is output by screen display by the display 713, voice output from the speaker 710, or the like (step S902). As described in step S804 of FIG. 8, the data transmission request notification includes information about the data. The navigation device 621 outputs these pieces of information, and waits for the passenger of the vehicle 620 to determine whether to receive data. That is, it is determined whether or not a data transmission request for data transmission has been input (step S903).

[0088] When it is determined that the passenger receives data and a data transmission request for data transmission is input (step S903: Yes), navigation device 621 transmits data to navigation device 611. A request signal is returned (step S904). At this time, as the address of the navigation device 611, the transmission source address of the data transmission request notification received in step S901 is used. In addition, if you want data for a specific area, you may send information that can identify the area, such as the district name.

Then, it waits until the data requested to be transmitted is received (step S 905: No loop), and when data is received (step S 905: Yes), the processing according to this flowchart is terminated. On the other hand, if no data transmission request is input in step S903 (step S903: No), the process returns to step S901 and the subsequent processing is repeated.

Here, an output form of the data transmission request notification in step S902 will be described. FIG. 10 is an explanatory diagram showing an example of a screen display of a data transmission request notification. On the display 713 of the navigation device 621, a new message 1001 of the data transmission request notification is displayed.

[0091] The new message 1001 includes the sender information 1011, the location information 1012, the category information 1013, the title information 1014, the reception date and time of the data for which a new data transmission request notification has been made. Information 1015, access time limit information 1016, detailed information presence / absence information 1017, and data type information 1018 are displayed.

[0092] The sender information 1011 is information for specifying a data transmission source such as IDs of the vehicles 610 and 620, for example. The position information 1012 indicates the position where the data to be transmitted is acquired. The category information 1013 indicates what category the information content belongs to. Title information 1014 indicates the title of the data. The reception date / time information 1015 indicates the date / time when the data transmission request notification is received. The access time limit information 1016 indicates the data transmission time limit set by the sender. Detailed information presence / absence information 1017 indicates the presence / absence of detailed information about data. Data type information 1018 indicates the format of the data. This information is included in the data transmission request notice.

Further, a receivable data list 1021 which is a list of data transmission request notifications already received is displayed. Receivable data list 1021 displays sender information 1031, location information 1032, category information 1033, title information 1034, reception date and time information 1035, access time limit information 1036, presence / absence information of detailed information, just like new message 1001 1037 and data type information 1038 are displayed.

In the example shown in the figure, the data list is displayed in order from the newest reception date and time !, but the data can be sorted or selected according to the respective information. Further, data can be narrowed down by inputting a keyword in the search input box 1041 or selecting a data genre from the genre selection box 1042. Note that data whose access time limit has passed is deleted from the receivable data list 1021.

As described above, according to the data transmission / reception system 600 according to the embodiment, in the communication network having a plurality of communication terminals capable of communicating with each other, the current position acquired by the vehicle 610 is related. Data is transmitted to other communication terminals including other vehicles 620.

[0096] At that time, in the urgent data transmission request notification, by distributing the data acquisition location, acquisition date, etc., it is possible to more accurately determine whether or not to request data transmission to the passengers of other vehicles 620. Can be judged. In addition, by setting a data transmission time limit, it is possible to avoid transmitting data whose information value is diminished over time to another vehicle 620. In this way, it provides the necessary data for determining whether or not it is necessary data. As a result, it is possible to properly divide the necessary data from a huge amount of information on the network.

In the embodiment described above, a server for data transmission / reception may be installed on the 1S network in which data is transmitted / received between the vehicles 610 and 620, and the data may be centrally managed. For example, a passenger of a vehicle 610 uploads data to be transmitted to the server, and at the same time, a data transmission request notice is distributed from Sano to another vehicle 620. Passengers of other vehicles 620 who have received the data transmission request notification access the server each time they use the data or periodically download the necessary data. Alternatively, a data transmission request may be made to the server.

[0098] According to the configuration as described above, the communication volume and transmission / reception status of data can be further managed by the communication server. In addition, since data is not directly transmitted / received, personal information in which the communication addresses of the vehicles 610 and 620 are not known to each other can be protected.

Note that the data transmission method and data reception method described in the present embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, or a DVD, and is executed by being read by the computer. The program may be a transmission medium that can be distributed through a network such as the Internet.

Claims

The scope of the claims

[1] A communication terminal in a communication network that has multiple communication terminals that can communicate with each other.

Obtaining means for obtaining data relating to the current location of the communication terminal;

Distribution means for distributing the location information of the current location to a communication terminal other than the communication terminal;

As a result of the distribution of the point information by the distribution unit, a reception unit that receives a transmission request signal for data acquired by the acquisition unit from the other communication terminal; and a transmission request signal is received by the reception unit A transmission means for transmitting the data to the communication terminal that has transmitted the transmission request signal;

A communication terminal comprising:

[2] The delivery means includes:

2. The communication terminal according to claim 1, wherein information specifying the data is distributed to the other communication terminal.

[3] The distribution means includes:

2. The communication terminal according to claim 1, wherein the time when the data is acquired is distributed to the other communication terminal.

[4] A determination unit that determines whether or not to transmit the data based on an elapsed time from distribution by the distribution unit and whether or not the transmission request signal is received by the reception unit,

The transmission means includes

The data is transmitted to the communication terminal that has transmitted the transmission request signal based on the determination result determined by the determination means. Communication terminal.

[5] A communication terminal in a communication network that has multiple communication terminals capable of communicating with each other.

A first receiving means for receiving point information of a current point of a communication terminal other than the communication terminal; An output means for outputting the spot information received by the first receiving means; and when the spot information is outputted by the output means, an input of a data transmission request relating to the current spot of the other communication terminal is accepted. Input means;

A transmission means for transmitting a transmission request signal for the data when the transmission request is input by the input means;

Second receiving means for receiving the data from the other communication terminal as a result of the transmission request signal being transmitted by the transmitting means;

A communication terminal comprising:

[6] The first receiving means includes:

Furthermore, the information specifying the data is received from the other communication terminal,

The output means includes

6. The communication terminal according to claim 5, further comprising: information specifying the data received by the first receiving unit.

[7] The first receiving means includes

Further, the time when the data was acquired is received by the other communication terminal, and the output means

The communication terminal according to claim 5 or 6, further comprising outputting the time received by the first receiving means.

[8] A communication server capable of mutual communication with a plurality of communication terminals,

A first receiving means for receiving the location information of the current location of the one communication terminal and the data from one communication terminal having data on the current location among the plurality of communication terminals;

Distribution means for distributing the point information received by the first receiving means to another communication terminal other than the one communication terminal;

Second receiving means for receiving the transmission request signal of the data received by the first receiving means as a result of the delivery of the point information by the distributing means;

When a transmission request signal is received by the second receiving means, the transmission request signal Transmitting means for transmitting the data to the communication terminal that has transmitted the signal;

A communication server comprising:

[9] A data transmission method using a communication terminal in a communication network having a plurality of communication terminals capable of communicating with each other.

An acquisition step of acquiring data relating to the current location of the communication terminal;

A distribution step of distributing the location information of the current location to a communication terminal other than the communication terminal;

As a result of the distribution of the point information by the distribution step, a reception step of receiving the transmission request signal of the data acquired by the acquisition step by the other communication terminal, and a transmission request signal has been received by the reception step A transmission step of transmitting the data to the communication terminal that has transmitted the transmission request signal;

A data transmission method comprising:

[10] A data reception method using a communication terminal in a communication network having a plurality of communication terminals capable of communicating with each other.

A first receiving step of receiving location information of a current location of a communication terminal other than the communication terminal;

An output step for outputting the location information received in the first reception step; and when the location information is output in the output step, an input of a data transmission request regarding the current location of the other communication terminal is accepted. Input process;

A transmission step of transmitting the data transmission request signal when the transmission request is input in the input step;

A second reception step of receiving the data from the other communication terminal as a result of the transmission request signal being transmitted in the transmission step;

A data receiving method comprising:

[11] A data transmission method using a communication server capable of mutual communication with a plurality of communication terminals.

The first reception for receiving the location information of the current location of the one communication terminal and the data from the one communication terminal having data on the current location among the plurality of communication terminals. Process,

A distribution step of distributing the point information received by the first reception step to another communication terminal other than the one communication terminal;

A second reception step of receiving the transmission request signal of the data received by the first reception step as a result of the distribution of the point information by the distribution step;

A transmission step of transmitting the data to a communication terminal that has transmitted the transmission request signal when a transmission request signal is received in the second reception step;

A data transmission method comprising:

[12] A data transmission program causing a computer to execute the data transmission method according to claim 9 or 11.

[13] A data reception program causing a computer to execute the data reception method according to claim 10.

[14] A computer-readable recording medium on which the data transmission program according to claim 12 is recorded.

[15] A computer-readable recording medium on which the data receiving program according to claim 13 is recorded.