MAP DIFFERENCE DATA DISTRIBUTION DEVICE, MAP DIFFERENCE DATA DISTRIBUTION METHOD, AND VEHICLE NAVIGATION DEVICE

WIPO Patent Application WO/2014/171112

A1

A map difference data distribution device is provided with a difference data storage unit (12), a distribution processing unit (13), a prediction unit (231), a remaining capacity determination unit (233), and an over-capacity assessment unit (232a). The prediction unit predicts whether undistributed difference group data is to be distributed on the basis of the distance between a user's residence and a data reference point among difference group data stored in the difference data storage unit, predicts from a dependence list the dependence-target difference group data of the difference group data that is to be distributed, and predicts the total data quantity thereof in relation to the next distribution period established by a difference update cycle. The distribution processing unit limits the data to be distributed in the next distribution period to a portion of the difference group data stored in the difference data storage unit on the basis of rules set in advance, while establishing a data amount that does not exceed the remaining capacity determined by the remaining capacity determination unit when the over-capacity assessment unit has assessed that the map data storage area is liable to be over capacity in the next distribution period.

NOMURA TOSHIO (JP)

PCT/JP2014/002031

October 23, 2014

April 09, 2014

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DENSO CORP (JP)

G09B29/00; G01C21/26

JP2009175252A	2009-08-06
JP2013029595A	2013-02-07
JP2006317643A	2006-11-24
JP2009288347A	2009-12-10
JP2001165669A	2001-06-22

KIN, Junhi (JP)
Gold Junki (JP)

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