Navigation guide device and navigation guide system, method thereof, program therefor, and medium for storing the program
First Claim
1. A navigation guide device comprising:
- current position acquisition section for acquiring information regarding the current position of a mobile body;
target point acquisition section for acquiring information regarding a target point the mobile body wants to reach;
information storing section for storing information regarding the current position and target point;
communication state monitoring section which monitors signal transmission state under which transmission of a signal notifying the current position and target point to a path determining section will occur so that the path determining section can determine an appropriate path connecting the current position with the target point, as well as signal reception state under which reception of a signal notifying the appropriate path determined by the path determining section will occur;
guide information presenting section for presenting guide information based on the received information about the appropriate path; and
communication control section which, if the communication state monitoring section finds communication is impossible, instructs the information storing section to store information regarding the current position and target point until communication becomes possible and transmission of the information regarding the current position and target point is completed.
1 Assignment
0 Petitions
Accused Products
Abstract
A communication state monitoring section 35 of a terminal unit 2 installed in a vehicle checks whether communication is possible between the terminal unit 2 and a server system 3. If the section in question finds communication is not possible, information regarding the current position of the vehicle and its target point and search condition acquired by the terminal unit 2 is stored in an internal memory, and communication is suspended. Communication state is checked at predetermined intervals. As soon as it is confirmed that communication is possible, the server system 3 determines a path to be taken by the mobile body and a signal notifying the path is transmitted to the terminal unit 2, which then guides the navigation of the vehicle. According to this system, it is not necessary to restart operations even if communication is interrupted and recovers after a certain interval, which will improve the utility of the system.
32 Citations
20 Claims
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1. A navigation guide device comprising:
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current position acquisition section for acquiring information regarding the current position of a mobile body;
target point acquisition section for acquiring information regarding a target point the mobile body wants to reach;
information storing section for storing information regarding the current position and target point;
communication state monitoring section which monitors signal transmission state under which transmission of a signal notifying the current position and target point to a path determining section will occur so that the path determining section can determine an appropriate path connecting the current position with the target point, as well as signal reception state under which reception of a signal notifying the appropriate path determined by the path determining section will occur;
guide information presenting section for presenting guide information based on the received information about the appropriate path; and
communication control section which, if the communication state monitoring section finds communication is impossible, instructs the information storing section to store information regarding the current position and target point until communication becomes possible and transmission of the information regarding the current position and target point is completed. - View Dependent Claims (2, 3, 4, 5, 6, 8, 10)
the communication control section instructs the information storing section to store information regarding the current position and target position, until communication becomes possible and information regarding the current position and target point is transmitted to the path determining section so that said section can determine an appropriate path based on the information, and reception of said appropriate path is achieved.
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3. A navigation guide device according to claim 1 wherein:
the communication control section suspends transmission of a signal notifying the current position and target point and reception of a signal notifying an appropriate path determined by the path determining section until the communication state monitoring section finds communication is possible.
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4. A navigation guide device according to claim 3 wherein:
the communication control section withdraws communication suspension as soon as it finds transmission and reception of said signals are completed.
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5. A navigation guide device according to claim 1 wherein:
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the communication state monitoring section checks at predetermined intervals whether communication is possible; and
the communication control section allows communication to be started only after the communication state monitoring section finds communication is possible.
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6. A navigation guide system comprising:
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a server system with a path determining section which is capable of communicating with a navigation guide device according to claim 1;
the navigation guide device; and
communication section enabling communication between the server system and the navigation guide device.
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8. A navigation guide system according to claim 6 wherein:
the server system comprises a memory section which, provided that a signal notifying a path to be taken by the mobile body determined by the path determining section is not received by the terminal unit, stores information about the path until said signal is successfully received by the terminal unit.
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10. A navigation guide system according to claim 8 wherein:
the server system causes the information about the path stored in the memory section to be transmitted to the terminal unit as soon as the communication state monitoring section finds communication is possible.
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7. A navigation guide system comprising:
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a terminal unit having current position acquisition section for acquiring information regarding the current position of a mobile body, target point acquisition section for acquiring information regarding a target point the mobile body wants to reach, information storing section for storing information regarding the current position and target point, and guide information presenting section for presenting guide information about a path to be taken by the mobile body determined based on the information regarding the current position and target point;
a server system having a path determining section for determining a path to be taken by the mobile body based on the information regarding the current position and target point;
communication section for allowing a signal notifying the current position and target point to be transmitted from the terminal unit to the path determining section of the server system, and a signal notifying the path determined by the path determining section to be transmitted from the server system to the terminal unit;
communication state monitoring section for monitoring the communication state of the communication section; and
a communication control section which, if the communication state monitoring section finds communication is not possible, instructs the information storing section to store the information regarding the current position and target point until communication becomes possible and transmission of the information regarding the current position and target point is completed. - View Dependent Claims (9, 11)
the server system comprises a memory section which, provided that a signal notifying a path to be taken by the mobile body determined by the path determining section is not received by the terminal unit, stores information about the path until said signal is successfully received by the terminal unit.
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11. A navigation guide system according to claim 9 wherein:
the server system causes the information about the path stored in the memory section to be transmitted to the terminal unit as soon as the communication state monitoring section finds communication is possible.
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12. A navigation guide method for guiding, by section of calculation section, the navigation of a mobile body by providing the mobile body with necessary information at critical points along a path connecting the current position of the mobile body with its target point comprises the steps of:
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acquiring information regarding the current position of the mobile body and its target point;
transmitting the information regarding the current position and target point;
monitoring the reception of a signal carrying information about a path determined based on the information regarding the current position and target point; and
,if the monitoring step reveals the impossibility of communication, storing the information regarding the current position and target point in such a manner as to allow ready reading-out until a communicable state reappears and transmission of a signal notifying the current position and target point is completed. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
the information regarding the current position and target point is stored until it is confirmed communication becomes possible, and a signal notifying the current position and target point has been transmitted, and a signal notifying a path determined based on the information regarding the current position and target point has been received.
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14. A navigation guide method according to claim 12 wherein:
transmission of a signal notifying the current position and target point and reception of a signal notifying the path determined by the path determining section are both suspended until the communication state monitoring section finds communication is possible.
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15. A navigation guide method according to claim 14 wherein:
communication suspension is withdrawn as soon as the system finds transmission and reception of said signals are completed.
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16. A navigation guide method according to claim 12 wherein:
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it is checked at predetermined intervals whether communication is possible; and
communication is started as soon as it is confirmed that communication is possible.
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17. A navigation guide method according to claim 12 wherein:
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the terminal unit installed in a mobile body acquires information regarding the current position of the mobile body and its target point;
a signal carrying information regarding the current position and target point acquired by the terminal unit is transmitted to a server system, thereby permitting the server system to determine an appropriate path based on the information;
a signal notifying the path determined by the server system is transmitted to the terminal unit so that the terminal unit can provide guide information with respect to the tracking of the path.
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18. The navigation guide method according to claim 17 wherein:
the server system, when it finds that a signal notifying the path determined by the path determining section is not received by the terminal unit, memorizes information about the path.
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19. The navigation guide method according to claim 18 wherein:
the server system, as soon as it finds communication is possible, causes the information about the path stored to be transmitted to the terminal unit.
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20. A navigation guide program embodied on a computer readable medium whereby it is possible for a calculation section to effect a navigation guide method according to claim 12.
Specification