Traffic information distribution method, traffic information distribution apparatus and in-vehicle terminal
First Claim
1. A traffic information distribution method implemented in a computer which distributes predicted traffic information regarding a road traffic situation individually to each of in-vehicle terminals equipped with vehicles, the computer comprising a predicted traffic information accumulation unit for accumulating at least a group of a plurality of pieces of the predicted traffic information, each piece of which pertains to a different time that belongs to a same time-line, the method allowing the computer to perform the steps comprising:
- a distribution request information reception step of receiving from the in-vehicle terminal distribution request information which requests the computer to distribute the predicted traffic information;
a reference information selection step of selecting one of the plurality of pieces of the predicted traffic information, each piece of which pertains to a different time that belongs to the same time-line, as reference traffic information, when the received distribution request information contains a distribution request for requesting the plurality of pieces of the predicted traffic information, each piece of which pertains to a different time that belongs to a same time-line;
a difference traffic information generation step of generating difference traffic information between the predicted traffic information, which is not selected as the reference traffic information, and the reference traffic information; and
a traffic information distribution step of distributing entire information of the selected predicted traffic information and only the difference traffic information of non-selected predicted traffic information to the in-vehicle terminal.
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Accused Products
Abstract
Disclosed is a traffic information distribution apparatus 1 including date-time information in traffic information acquired by the traffic information acquire unit 12 or generated by the traffic information prediction unit, and accumulates the traffic information in the traffic information DB 13. When the traffic information distribution apparatus 1 receives distribution request information transmitted from the in-vehicle terminal 5, based on date-time information of reference traffic information held by the in-vehicle terminal 5 included in the distribution request information, the traffic information distribution apparatus 1 retrieves traffic information including the same date-time information as the date-time information of the reference traffic information from the traffic information DB 13. Then, difference traffic information generation unit 18 generates difference traffic information between the retrieved traffic information and traffic information to be distributed, and the traffic information distribution apparatus 1 distributes the generated difference traffic information to the in-vehicle terminal 5.
45 Citations
8 Claims
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1. A traffic information distribution method implemented in a computer which distributes predicted traffic information regarding a road traffic situation individually to each of in-vehicle terminals equipped with vehicles, the computer comprising a predicted traffic information accumulation unit for accumulating at least a group of a plurality of pieces of the predicted traffic information, each piece of which pertains to a different time that belongs to a same time-line, the method allowing the computer to perform the steps comprising:
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a distribution request information reception step of receiving from the in-vehicle terminal distribution request information which requests the computer to distribute the predicted traffic information; a reference information selection step of selecting one of the plurality of pieces of the predicted traffic information, each piece of which pertains to a different time that belongs to the same time-line, as reference traffic information, when the received distribution request information contains a distribution request for requesting the plurality of pieces of the predicted traffic information, each piece of which pertains to a different time that belongs to a same time-line; a difference traffic information generation step of generating difference traffic information between the predicted traffic information, which is not selected as the reference traffic information, and the reference traffic information; and a traffic information distribution step of distributing entire information of the selected predicted traffic information and only the difference traffic information of non-selected predicted traffic information to the in-vehicle terminal.
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2. A traffic information distribution apparatus which acquires or generates traffic information on a road traffic situation and distributes the traffic information individually to each of in-vehicle terminals equipped with vehicles, the apparatus comprising:
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a traffic information accumulation unit configured to include predetermined identification information in the traffic information and accumulate in a storage device the traffic information which includes the identification information when the traffic information distribution apparatus acquires or generates the traffic information; a distribution request information reception unit configured to receive distribution request information transmitted from the in-vehicle terminal and contain identification information included in reference traffic information the in-vehicle terminal holds at the time when the in-vehicle terminal transmits the distribution request information; a difference traffic information generation unit configured to generate difference traffic information between the traffic information stored in the storage device and having a same identification information as the identification information included in the reference traffic information contained in the received distribution request information and the traffic information which is to be distributed at the time when the difference traffic information is generated; and a traffic information distribution unit configured to distribute the generated difference traffic information to the in-vehicle terminal. - View Dependent Claims (3, 4, 5, 6, 7)
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8. A traffic information distribution apparatus which distributes predicted traffic information regarding a road traffic situation individually to each of in-vehicle terminals equipped with vehicles, comprising:
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a predicted traffic information accumulation unit configured to accumulate at least a group of a plurality of pieces of the predicted traffic information each of which pertains to a different time that belongs to a same time-line; a distribution request information reception unit configured to receive from the in-vehicle terminal distribution request information which requests the traffic information distribution apparatus to distribute the predicted traffic information; a reference traffic information selection unit configured to select as reference traffic information one of the plurality of pieces of the predicted traffic information each of which pertains to a different time that belongs to the same time-line, when the received distribution request information contains a distribution request for requesting the plurality of pieces of the predicted traffic information each of which pertains to a different time that belongs to the same time-line; a difference traffic information generation unit configured to generate difference traffic information between the reference traffic information and the predicted traffic information which is not selected as the reference traffic information; a traffic information distribution unit configured to distribute entire information of the selected predicted traffic information and only the difference traffic information of non-selected predicted traffic information.
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Specification