Title:
地図データ配信装置、通信端末および地図配信方法
Document Type and Number:
Japanese Patent JP4684228
Kind Code:
B2
Abstract:
An updated part of map data is delivered while suppressing unwanted communication traffic and preventing contradiction in the updatedmap. Amap delivering server (10) comprises a map data storage section (102) storing link data including the update dates and times and update infection range for each link, a network IF section (101) for receiving from a navigation terminal (20) a map delivery request containing the requested area of map delivery and the previous request data and time of map delivery of the requested area, and a map element search section (103) for searching the map data storage section (102) for the link data associated with the update infection range including the link at least a part of which belongs to the requested area of the map delivery request and associated with the update date and time later than the previous request date and time contained in the map delivery request. The link data found by the map element search section (103) is sent to the navigation terminal (20) through the network IF section (101).
Inventors:
Masaaki Tanizaki
Atsushi Hiroike
Shigeru Shimada
Atsushi Hiroike
Shigeru Shimada
Application Number:
JP2006528382A
Publication Date:
May 18, 2011
Filing Date:
April 27, 2005
Export Citation:
Assignee:
Hitachi Automotive Systems, Ltd.
International Classes:
G09B29/00; G01C21/00; G06F13/00; G06F17/30; G08G1/137
Domestic Patent References:
| JP2004178248A | 2004-06-24 | |||
| JP2004205994A | 2004-07-22 | |||
| JP2000036097A | 2000-02-02 | |||
| JP2004077459A | 2004-03-11 | |||
| JP2004125553A | 2004-04-22 |
Attorney, Agent or Firm:
Shoyo domestic and overseas patent office