Terminal database managing system as latest version

• US 5,684,989 A
• Filed: 06/07/1995
• Issued: 11/04/1997
• Est. Priority Date: 05/27/1991
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Nissato, Hiroyuki
• Primary Examiner(s): Black, Thomas G.
• Assistant Examiner(s): Homere, Jean Raymond
• Application Number:
  US08/485,119
• Time in Patent Office: 881 Days
• Field of Search: 395/600, 395/610, 395/615, 395/608, 395/616, 395/617, 395/200.08, 395/200.03, 395/839, 395/853, 364/DIG. 1
• US Class Current: 707/695
• CPC Class Codes: G06F 16/219 Managing data history or versioning querying versioned data G06F16/2474; querying temporal data G06F16/2477
• CPC Class Codes: Y10S 707/99938 Concurrency, e.g. lock management in shared database
• CPC Class Codes: Y10S 707/99945 Object-oriented database structure processing
• CPC Class Codes: Y10S 707/99952 Coherency, e.g. same view to multiple users

Abstract

The present invention relates to a latest managing system of terminal database DB. The present invention curtails the waiting time for using a map at a terminal by deleting undefined map data from the map data of the terminal data base DB and transmitting defined map number and version number of the host at a predetermined time or according to an instruction from the host to update map data of the terminal data base to the latest map data provided by the host. A plurality of terminals are connected with a host through transmission lines. Map data of the map number other than those defined in the distribution defining file is deleted from the map data of the terminal data base either at the predetermined time or according to an instruction from the host. The current terminal version number of a map having the defined map number is transmitted from a terminal to the host through a transmission line and when the terminal version number is older than the host version number, the latest map data and host version number are transferred to the terminal to update the terminal map DB of the terminal to the latest version number.

Claims

1. A latest managing system, including a plurality of terminals connected to a host through a transmission line, the system comprising:

a host map data base storing map data for the plurality of terminals;

a terminal map database DB, storing defined and undefined map data corresponding to terminal map numbers having corresponding terminal version numbers and storing a distribution defining file stored in said terminal map database DB and defining the map data which are to be updated, wherein;

said undefined map data, which is map data not defined in said distribution defining file, is deleted from said terminal data base at the predetermined time or according to instructions from the host;

at least one of said terminal version numbers of the defined terminal map numbers is transmitted to the host through the transmission line; and

the latest map data and host version number are transferred, when the terminal version number is older than the host version number and the map data is defined in the distribution defining file, to the terminal to update the terminal map database.

2. A latest managing system of terminal database DB according to claim 1, wherein said predetermined time is set at an idle time where the terminal is not utilized.

3. A latest managing system, including a plurality of terminals connected to a host through a transmission line, the system comprising:

a host map database storing map data for the plurality of terminals;

a terminal map database DB, storing defined and undefined map data corresponding to terminal map numbers having corresponding terminal version numbers;

a distribution defining file, defining map data having corresponding map numbers and map version numbers, which are to be updated; and

a map update section, interfacing with the host, deleting undefined map data from said terminal data base at the predetermined time or according to instructions from the host, wherein;

at least one of said terminal version numbers of defined map numbers is transmitted to the host through the transmission line, and

the latest map data and host version number are transferred, when the current terminal version number is older than the host version number and the map data is defined in the distribution defining file, to the terminal to update the terminal map database.

4. A latest managing system, including a plurality of terminals connected to a host through a transmission line, the system comprising:

a host map database, storing map data, its map number and its version number for the plurality of terminals;

a distribution defining file, storing map numbers to be stored in said terminals;

a terminal map database, storing map data of which map number is defined or not defined in said distribution defining file, its map number and its version number;

an updating means for deleting map data, of which map number is not defined in said distribution defining file, in said terminal database at the predetermined time or according to instructions from the host; and

a transferring means for transferring map data, of which version number in said terminal map data base is older than the version number in said host map database and of which map number is defined in said distribution defining file, from said host map database through the transmission line.