JP2004304655A - Data relay system, data relay program, recording medium, and data relay method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data relay system and the like in which the range of data communications can be expanded by any simple method via a data relay apparatus 20 without densely disposing road side transmission apparatuses 1 when performing data communications using DSRC between each road side transmission apparatus and a traveling vehicle. <P>SOLUTION: The data transmission apparatus 1 transmits data to a data relay apparatus 20 that is installed on an automobile 30, by a transmission part 4 to entrust data relay thereto. With respect to data received by a receiving part 24, the data relay apparatus 20 distributes the entrusted data to a (non-illustrated) receiving apparatus of an automobile 32a or the like on the basis of conditions (predetermined conditions) in entrusting. As the predetermined conditions, a condition of distribution for each predetermined traveling distance Lc, a condition of distribution at the interval of a predetermined time Tc and the like, are available. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a data relay system and the like for relaying data communication using dedicated narrow-area communication between a data transmission device installed on a roadside and a vehicle.
[0002]
[Prior art]
[Non-patent Document 1] "Navigation System", edited by Hiromi Arai and Shoichi Washino, p. 140, first edition issued on July 31, 2001, Sankaido.
[0003]
2. Description of the Related Art In an automatic toll collection (ETC) system at a tollgate such as a toll road, which has recently started operation, a communication device (roadside) of a tollgate and a vehicle side as described in Non-Patent Document 1. The road-to-vehicle wireless communication between the two is performed using dedicated short-range communication (DSRC).
[0004]
Development of a data communication system for performing data communication between a roadside communication device having a DSRC roadside device antenna provided on a road other than a tollgate and a traveling vehicle by using the above-described DSRC has been advanced. . However, such a data communication system using DSRC has a problem that communication is limited to communication with a vehicle within a range of about 30 m around a DSRC roadside antenna.
[0005]
[Problems to be solved by the invention]
In order to solve the above-described problems, conventionally, a system has been developed in which roadside communication devices are densely arranged along a road or a plurality of adjacent roadside communication devices are operated in cooperation with each other. However, when the roadside communication devices are densely arranged, there is a problem that the cost is required in proportion to the number of the roadside communication devices. A system that operates a plurality of adjacent roadside communication devices in cooperation with each other has a problem that a communication method for a traveling automobile becomes complicated.
[0006]
Therefore, an object of the present invention is to solve the above problem, and when performing data communication between a roadside transmitting device and a traveling vehicle using DSRC, the roadside transmitting devices are densely arranged. It is an object of the present invention to provide a data relay system or the like that can extend the range of data communication by a simple method without performing.
[0007]
[Means for Solving the Problems]
A data relay system of the present invention is a data relay system for relaying data communication using a dedicated short-range communication between a data transmission device installed on a roadside and a vehicle side, wherein the data communication is performed to the vehicle side. Having a data relay device installed in a relay vehicle to relay,
The data transmission device includes a transmission unit that transmits data using dedicated short-range communication,
The data relay device,
Receiving means for receiving the data transmitted by the transmitting means,
And a distribution unit that distributes the data received by the reception unit to a lane opposite to the relay vehicle on which the vehicle travels based on predetermined conditions while the relay vehicle is traveling.
[0008]
Here, in the data relay system of the present invention,
The data relay device may further include a report transmitting unit that transmits a report of data distribution by the distribution unit to a data distribution report receiving device installed on a roadside.
[0009]
Here, in the data relay system of the present invention, the predetermined condition in the distribution means may be a condition for distribution for each predetermined traveling distance.
[0010]
Here, in the data relay system according to the present invention, the predetermined condition in the distribution means may be a condition for distribution every predetermined elapsed time.
[0011]
Here, in the data relay system of the present invention, the predetermined condition in the distribution means may be a condition for distributing when the vehicle is detected by a detection device that detects the vehicle.
[0012]
Here, in the data relay system according to the present invention, the distribution condition in the distribution means may be a distribution condition under a predetermined termination condition.
[0013]
A data relay program according to the present invention is a data relay program for relaying data communication using a dedicated short-range communication between a data transmitting device installed on a roadside and a vehicle to the vehicle, and relaying the data communication. Computer of the data relay device installed in the relay vehicle
Receiving means for receiving data using the dedicated short-range communication transmitted from the data transmitting device,
It is a data relay program for functioning as distribution means for distributing data received by the receiving means to a lane opposite to the relay vehicle on which the vehicle is traveling, based on predetermined conditions while the relay vehicle is traveling.
[0014]
Here, in the data relay program of the present invention,
The information processing apparatus may further include a report transmitting unit that transmits a report of data distribution by the distribution unit to a data distribution report receiving device installed on a roadside.
[0015]
Here, in the data relay program of the present invention, the predetermined condition in the distribution means may be a condition for distribution for each predetermined traveling distance.
[0016]
Here, in the data relay program of the present invention, the predetermined condition in the distribution means may be a condition for distribution at every predetermined elapsed time.
[0017]
Here, in the data relay program of the present invention, the predetermined condition in the distribution means may be a condition for distributing when the vehicle is detected by a detection device for detecting the vehicle.
[0018]
Here, in the data relay program of the present invention, the condition for distribution in the distribution means may be a condition for distribution under a predetermined end condition.
[0019]
The recording medium of the present invention is a computer-readable recording medium that records the data relay program of the present invention.
[0020]
A data relay method according to the present invention is a data relay method for relaying data communication using a dedicated short-range communication between a data transmission device installed on a roadside and a vehicle side, wherein the data communication is performed to the vehicle side. It uses a data relay device installed in a relay vehicle to relay,
A transmission step in which the data transmission device transmits data using dedicated short-range communication,
A receiving step in which the data relay device receives the data transmitted in the transmitting step;
A distribution step of distributing the data received in the receiving step to the oncoming lane side of the relay vehicle on which the vehicle travels, based on predetermined conditions while the relay vehicle is traveling, based on predetermined conditions. And
[0021]
Here, in the data relay method of the present invention,
Following the distribution step, the method may further include a report transmission step of transmitting a report that the data relay device distributes data to a data distribution report receiving device installed on a roadside.
[0022]
Here, in the data relay method of the present invention, the predetermined condition in the distribution step may be a condition for distribution for each predetermined traveling distance.
[0023]
Here, in the data relay method of the present invention, the predetermined condition in the distribution step may be a condition for distribution every predetermined elapsed time.
[0024]
Here, in the data relay method of the present invention, the predetermined condition in the distribution step may be a condition for distributing when a receiving device is detected by a detecting device that detects the receiving vehicle.
[0025]
Here, in the data relay method of the present invention, the condition for distribution in the distribution step may be a condition for distribution under a predetermined end condition.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0027]
Embodiment 1 FIG.
FIG. 1 shows a data relay system 11 according to Embodiment 1 of the present invention. As shown in FIG. 1, the left direction is the L direction and the right direction is the R direction in FIG. 1, and the road has a P lane traveling in the R direction and a Q lane traveling in the L direction which is the opposite lane. are doing. Although only one lane is shown on each side, this is for the sake of illustration and the data relay system of the present invention is not limited to the number of lanes. In FIG. 1, reference numeral 1 denotes a data transmission device installed on the roadside, 30 denotes an automobile (broadcast vehicle) running on the P lane in the R direction, and 32a, 32b and 32n denote automobiles (vehicles) running on the Q lane in the L direction. , 20 are data relay devices installed in an automobile 30 (broadcast vehicle).
[0028]
Subsequently, reference numeral 42 denotes data communication using the dedicated short range communication (DSRC) from the data transmission device 1 to the vehicle 30 traveling at the position S, and reference numeral 42a denotes data transmission from the data relay device 20 of the vehicle 30 traveling at the position A. Data communication using DSRC to the automobile 32a, 42b data communication using the DSRC from the data relay device 20 of the automobile 30 traveling at the location B to the automobile 32b, 42n data of the automobile 30 traveling at the location N 9 shows data communication from the relay device 20 to the automobile 32n using DSRC. Reference numeral 40 denotes a range of data communication from the data transmitting device 1, 40a denotes a range of data communication from the data relay device 20 of the vehicle 30 traveling at the position A, and 40b denotes data of the vehicle 30 traveling at the position B. The range of data communication from the relay device 20 and the range 40n indicate the range of data communication from the data relay device 20 of the automobile 30 traveling at the position N.
[0029]
FIG. 2A is a block diagram illustrating functions of data transmitting apparatus 1 according to Embodiment 1 of the present invention. In FIG. 2A, reference numeral 2 denotes a functional block in which a function of the data transmission device 1 is illustrated in a block diagram, and reference numeral 4 denotes a transmission unit (transmission unit) that transmits data using DSRC. FIG. 2B is a block diagram illustrating functions of data relay device 20 according to Embodiment 1 of the present invention. In FIG. 2B, reference numeral 22 is a functional block diagram of the function of the data relay device 20, reference numeral 24 is a receiving unit (receiving unit) for receiving data transmitted by the transmitting unit 4, and reference numeral 26 is a receiving unit 24. A distribution unit that distributes the received data to the opposite lane (Q lane) on which the automobiles 32a, 32b, 32n, and the like (hereinafter, abbreviated as “automobiles 32a, etc.”) travel based on predetermined conditions while the automobile 30 is traveling. (Distribution means).
[0030]
The data relay system 11 and the like of the present invention use the DSRC to transmit data from the transmission unit 4 of the data transmission device 1 having data to be transmitted to the vehicle 32a and the like via the data relay device 20 installed in the vehicle 30. Is realized. That is, the data transmission device 1 transmits data to the data relay device 20 installed in the automobile 30 by the transmission unit 4 and entrusts data relay. The data relay device 20 distributes the data entrusted to the receiving device (not shown) such as the car 32a by the distribution unit 26 based on the conditions (predetermined conditions) when the data received by the receiving unit 24 is entrusted. . As described above, data relay can be realized.
[0031]
For example, it is assumed that the data relay is performed N times from the position A to the position N in FIG. Here, it is assumed that the reach 40 of data communication from the data transmission device 1 is 30 m, and the reach 40a, 40b, and 40n of data communication from the vehicle 30 is also 30 m. Assuming that data relaying has been performed N = 9 times, the reach of data communication from the data transmitting apparatus 1 is 30 m of the original reach 40a, and the reach of N = 9 repeats (30m × 9). = 270 m).
[0032]
FIG. 3 is a flowchart illustrating a function flow or a data relay method of the data relay system 11 according to the first embodiment of the present invention. As shown in FIG. 3, first, the data transmission device 1 transmits data using DSRC (transmission step, step S10). Next, the data relay device 20 receives the data transmitted in the transmitting step (step S10) (receiving step, step S20). Subsequently, the data relay device 20 distributes the data received in the receiving step (step S20) to the opposite lane (Q lane) of the automobile 30 on which the automobile 32a or the like travels based on predetermined conditions while the automobile 30 is traveling. (Distribution step, step S30).
[0033]
As described above, according to Embodiment 1 of the present invention, when data communication is performed between the roadside transmission device 1 and the traveling vehicle 32a or the like using the DSRC, first, the data transmission device 1 The data is transmitted by the transmission unit 4 to the data relay device 20 installed at 30 and the data relay is entrusted. The data relay device 20 distributes the data entrusted to the receiving device (not shown) such as the car 32a by the distribution unit 26 based on the conditions (predetermined conditions) when the data received by the receiving unit 24 is entrusted. . As described above, the range of data communication can be expanded by a simple method via the data relay device 20 without densely disposing the roadside transmission devices 1.
[0034]
Embodiment 2 FIG.
FIG. 4 shows a data relay system 12 according to Embodiment 2 of the present invention. In FIG. 4, the portions denoted by the same reference numerals as those in FIG. In FIG. 4, reference numeral 5 denotes a data distribution report receiving device installed on the roadside, reference numeral 42rep denotes data communication using DSRC from the data relay device 20 of the automobile 30 traveling in the position rep to the data distribution report receiving device 5, 40rep. Is a range in which data communication using DSRC reaches the data distribution report receiving device 5. The data relay device 20 can include a report transmission unit (report transmission unit; not shown) that can transmit a report of data distribution by the distribution unit 26 to the data distribution report receiving device 5 installed on the roadside.
[0035]
As described above, according to the second embodiment of the present invention, in addition to the first embodiment, data relay device 20 transmits a report of data distribution by distribution unit 26 to a data distribution report receiving device installed on the roadside. 5 can be provided. By performing this report, the data relay device 20 can notify the data relay system 12 that the data relay device 20 has relayed the data entrusted by the data transmission device 1.
[0036]
Embodiment 3 FIG.
FIG. 5 shows a data relay system 13 according to the third embodiment of the present invention. In FIG. 5, the portions denoted by the same reference numerals as those in FIG. As shown in FIG. 5, the distance between the position S and the position A is represented by Lc, the distance between the position A and the position B is represented by Lc, and the distance between the position N-1 and the position N is represented by Lc. Lc. That is, the predetermined condition in the distribution unit 26 can be set as a condition for distribution for each predetermined traveling distance Lc.
[0037]
As described above, according to the third embodiment of the present invention, the predetermined condition in distribution section 26 can be set as a condition for distribution for each predetermined traveling distance Lc. For this reason, distribution independent of the speed of the vehicle 30 can be realized.
[0038]
Embodiment 4 FIG.
FIG. 6 shows a data relay system 14 according to the fourth embodiment of the present invention. In FIG. 6, the portions denoted by the same reference numerals as those in FIG. As shown in FIG. 6, the elapsed time from the position S to the next delivery position S1 is Tc, the elapsed time from the position S1 to the next delivery position S2 is Tc, and the elapsed time from the position S _{N-1 is} The elapsed time until the next distribution position _SN is Tc. That is, the predetermined condition in the distribution unit 26 can be set as a condition for distributing every predetermined elapsed time Tc.
[0039]
As described above, according to Embodiment 4 of the present invention, a predetermined condition in distribution unit 26 can be set as a condition for distribution every predetermined elapsed time Tc. For this reason, distribution that does not depend on the traveling distance of the automobile 30 can be realized.
[0040]
Embodiment 5 FIG.
FIG. 7 shows a data relay system 15 according to the fifth embodiment of the present invention. In FIG. 7, the portions denoted by the same reference numerals as those in FIG. As shown in FIG. 7, the vehicle 30 can further include a detection device 21 that can detect the vehicle 32a and the like connected to the relay device 20. The distribution unit 26 of the relay device 20 can perform distribution when the detection device 21 detects the automobile 32a or the like. That is, the predetermined condition in the distribution unit 26 can be set as a condition for distribution when the detection device 21 detects the automobile 32a or the like.
[0041]
As described above, according to the fifth embodiment of the present invention, the predetermined condition in distribution unit 26 can be set as a condition for distribution when detecting device 21 detects automobile 32a or the like. Therefore, effective distribution can be realized when there are few cars on the Q lane side.
[0042]
Embodiment 6 FIG.
FIG. 8 shows a data relay system 16 according to the sixth embodiment of the present invention. In FIG. 8, portions denoted by the same reference numerals as those in FIG. As shown in FIG. 8, the distribution in each of the above-described embodiments is performed until the vehicle travels a predetermined distance Lm from the position S, and the distribution can be ended after the vehicle has passed the predetermined distance Lm. That is, the conditions for distribution by the distribution unit 26 in each of the above-described embodiments, for example, the conditions for distribution for each predetermined traveling distance, the conditions for distribution for each predetermined elapsed time, and the like can be ended under predetermined termination conditions. it can. In the above example, the distribution condition is set to end distribution after passing the predetermined distance Lm. However, another termination condition, for example, the distribution condition is set to end distribution after a predetermined time Tm has elapsed. Of course, it is possible.
[0043]
As described above, according to the sixth embodiment of the present invention, the conditions for distribution by the distribution unit 26 in each of the above-described embodiments, for example, the conditions for distribution for each predetermined traveling distance, and the distribution for each predetermined elapsed time Conditions can be terminated under predetermined termination conditions. For this reason, the distribution can be terminated according to the road condition.
[0044]
Embodiment 7 FIG.
FIG. 9 is a block diagram showing an internal circuit 50 of the computer of the data relay device 20 that executes the computer program of the present invention for realizing each of the embodiments described above. In FIG. 9, the above-described computer program of the present invention is recorded on a recording medium such as the ROM 52, the disk 55a, or the CD-ROM 55n. This computer program is loaded from the recording medium such as the ROM 52, the disk 55a or the CD-ROM 55n to the RAM 53 via the bus 56 via the controller 54. The input operation unit 58 is an input device such as a mouse or a numeric keypad for inputting data to the computer of the data relay device 20. The input control unit 57 is connected to the input operation unit 58 and performs input control and the like. The external interface (I / F) unit 59 has an interface function when the computer of the data relay device 20 communicates with the data transmitting device 1, the detecting device 21, or a receiving device (not shown) such as the automobile 32a.
[0045]
The object of the present invention can be achieved when the CPU 51 executes the above-described computer program of the present invention in the RAM 53. The computer program can be supplied to the computer CPU 51 in the form of a removable recording medium such as the CD-ROM 55n as described above, and the recording medium such as the CD-ROM 55n on which the computer program is recorded is similarly provided by the present invention. Will be constituted. As a recording medium on which the computer program is recorded, for example, a DVD, an optical disk, a memory card, a memory stick, an MO, an FD, or the like can be used in addition to the above-described recording medium.
[0046]
【The invention's effect】
As described above, according to the data relay system or the like of the present invention, when data communication is performed between the roadside transmitting device 1 and the running vehicle 32a using the DSRC, first, the data transmitting device 1 The data is transmitted by the transmission unit 4 to the data relay device 20 installed at 30 and the data relay is entrusted. The data relay device 20 distributes the data entrusted to the receiving device (not shown) such as the car 32a by the distribution unit 26 based on the conditions (predetermined conditions) when the data received by the receiving unit 24 is entrusted. . As a result, it is possible to provide a data relay system or the like that can expand the range of data communication by a simple method via the data relay device 20 without densely arranging the roadside transmission devices 1.
[Brief description of the drawings]
FIG. 1 is a diagram showing a data relay system 11 according to a first embodiment of the present invention.
FIG. 2 is a block diagram illustrating functions of a data transmission device 1 and the like according to Embodiment 1 of the present invention.
FIG. 3 is a flowchart illustrating a function flow or a data relay method of the data relay system 11 according to the first embodiment of the present invention.
FIG. 4 is a diagram showing a data relay system 12 according to a second embodiment of the present invention.
FIG. 5 is a diagram showing a data relay system 13 according to a third embodiment of the present invention.
FIG. 6 is a diagram showing a data relay system 15 according to a fourth embodiment of the present invention.
FIG. 7 is a diagram showing a data relay system 15 according to a fifth embodiment of the present invention.
FIG. 8 is a diagram showing a data relay system 16 according to a sixth embodiment of the present invention.
FIG. 9 is a block diagram showing an internal circuit 50 of a computer of the data relay device 20 that executes a computer program of the present invention for implementing each of the above-described embodiments.
[Explanation of symbols]
1 data transmitting device, 2,22 functional block, 4 transmitting unit, 5 data distribution report receiving device, 11, 12, 13, 14, 15, 16 data relay system, 20 data relay device, 21 detecting device, 24 receiving unit, 26 Distributor, 30 Car (broadcast vehicle), 32a, 32b, 32n Car (vehicle), 40, 42a, 42b, 42n, 40rep Data communication range, 42, 42a, 42b, 42n, 42rep Data using DSRC Communication, 50 internal circuit, 51 CPU, 52 ROM, 53 RAM, 54 computer roller, 55a disk, 55n CD-ROM, 56 bus, 57 input control unit, 58 input operation unit, 59 external I / F unit.

Claims (19)

A data relay system that relays data communication using a dedicated short-range communication between a data transmission device installed on a road side and a vehicle side, wherein the data relay system is installed in a relay vehicle that relays the data communication to the vehicle side. Has a data relay device,
The data transmission device includes a transmission unit that transmits data using dedicated short-range communication,
The data relay device,
Receiving means for receiving the data transmitted by the transmitting means,
A data relay system for distributing the data received by the receiving means to a side opposite to the relay vehicle on which the vehicle travels, based on predetermined conditions while the relay vehicle is traveling. . The data relay system according to claim 1,
The data relay system, further comprising: a report transmitting unit that transmits a report of data distribution by the distribution unit to a data distribution report receiving device installed on a roadside. 3. A data relay system according to claim 1, wherein said predetermined condition in said distribution means is a condition for distribution for each predetermined traveling distance. 3. The data relay system according to claim 1, wherein the predetermined condition in the distribution means is a condition for distribution at every predetermined elapsed time. 3. The data relay system according to claim 1, wherein the predetermined condition in the distribution unit is a condition for distribution when the vehicle is detected by a detection device that detects the vehicle. 6. The data relay system according to claim 3, wherein the condition for distribution in said distribution means is a condition for distribution under a predetermined end condition. A data relay program for relaying data communication using a dedicated short-range communication between a data transmission device installed on a road side and a vehicle side to the vehicle side, the data being installed in a relay vehicle relaying the data communication. Computer of the relay device, receiving means for receiving data using the dedicated short-range communication transmitted from the data transmission device,
A data relay program for functioning as distribution means for distributing data received by the receiving means to a lane opposite to the relay vehicle on which the vehicle travels, based on predetermined conditions while the relay vehicle is traveling. The data relay program according to claim 7,
A data relay program further comprising: a report transmitting unit that transmits a report of data distribution by the distribution unit to a data distribution report receiving device installed on a roadside. 9. The data relay program according to claim 7, wherein the predetermined condition in the distribution means is a condition for distribution every predetermined traveling distance. 9. The data relay program according to claim 7, wherein the predetermined condition in the distribution unit is a condition for distribution at every predetermined elapsed time. 9. The data relay program according to claim 7, wherein the predetermined condition in the distribution means is a condition for distribution when the vehicle is detected by a detection device for detecting the vehicle. 12. The data relay program according to claim 9, wherein a condition for distribution in the distribution means is a condition for distribution under a predetermined end condition. A computer-readable recording medium on which the data relay program according to any one of claims 7 to 12 is recorded. A data relay method for relaying data communication using a dedicated short-range communication between a data transmission device installed on a road side and a vehicle side, wherein the data relay method is installed in a relay vehicle that relays the data communication to the vehicle side. A transmission step of using a data relay device, wherein the data transmission device transmits data using dedicated narrow-area communication,
A receiving step in which the data relay device receives the data transmitted in the transmitting step;
A distribution step of distributing the data received in the receiving step to the oncoming lane side of the relay vehicle on which the vehicle travels, based on predetermined conditions while the relay vehicle is traveling, based on predetermined conditions. Data relay method. The data relay method according to claim 14,
A data transmission method, further comprising a report transmission step of transmitting a report of data distribution by the data relay device to a data distribution report receiving device installed on a roadside, following the distribution step. 16. The data relay method according to claim 14, wherein the predetermined condition in the distribution step is a condition for distribution for each predetermined traveling distance. 16. The data relay method according to claim 14, wherein the predetermined condition in the distribution step is a condition for distribution every predetermined elapsed time. 16. The data relay method according to claim 14, wherein the predetermined condition in the distributing step is a condition for distributing when a receiving vehicle is detected by a detecting device for detecting the receiving vehicle. 19. The data relay method according to claim 16, wherein a condition for distribution in the distribution step is a condition for distribution under a predetermined end condition.

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