Map data delivering device, communication terminal, and map delivering method
US7688228B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2005 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Apr 9, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B29/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An updated part of map data is delivered while suppressing unwanted communication traffic and preventing contradiction in the updated map. A map 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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.