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, a system control portion 20 instructs a terminal communication section 11 to transmit a signal carrying the necessary data stored in the internal memory to a server system 3. The server system 3 determines a path to be taken by the mobile body based on the data and transmits a signal notifying the path to the terminal unit 2. The terminal unit 2 receives the signal notifying the path thanks to the recovery of communication state and guides the navigation of the vehicle based on information about the path. 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.
26 Citations
21 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)
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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)
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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, 21)
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Specification