Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
1999-04-28
2001-07-17
Vu, Kim (Department: 2172)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000, C707S793000, C707S793000, C707S793000, C707S793000, C709S238000, C709S241000, C710S020000, C710S021000, C711S141000
Reexamination Certificate
active
06263347
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a system for linking data between a computer and a portable remote terminal and a data linking method therefor and, more particularly, to a system for linking data between a computer and a portable remote terminal enabling data extracted from a personal computer into a portable remote terminal to be edited and applied freely and a data linking method therefor.
2. Description of the Related Art
In recent years, more and more cases occur in business etc. where various information in a data base on a computer at an office is brought out by a portable remote terminal to user's destination and is made the most of. Conducted, for example, are bringing out customer's information into a portable remote terminal and referring to/editing the information, or bringing information of a product of outside trade into a portable remote terminal and referring to the information, or bringing out information about business negotiations that a user currently has into a portable remote terminal and making the most of the information.
In a case where data on a data base of a personal computer is read into a portable remote terminal and the portable remote terminal is brought to a user' destination to use the data, when a volume of data is large, much time is conventionally cost for the processing of extracting data from the personal computer into the portable remote terminal and the processing of synchronizing the terminal with the personal computer which is conducted when data editing is executed on the portable remote terminal because the data in the personal computer is taken in as it is into the portable remote terminal.
Also in conventional systems, data in a data base is taken in as it is into a portable remote terminal to result in bringing out data that needs not to be brought out by the portable remote terminal as well, which hinders operation and application when necessary data is actually referred to by the portable remote terminal.
Among conventional art related to data link between computers are, for example, distributed data base management systems disclosed in Japanese Patent Laying-Open (Kokai) No. Heisei 8-305714 and Japanese Patent Laying-Open (Kokai) No. Heisei 2-58165.
Disclosed in Japanese Patent Laying-Open (Kokai) No. Heisei 5-89004 is a technique of downloading a data base of a host computer into a portable remote terminal and uploading data updated offline by the portable remote terminal into the host computer in synchronization with the host computer.
The above-described conventional data link between a personal computer and a portable remote terminal has such problems as set forth below.
First, since data on the personal computer is taken in into the portable remote terminal as it is, when a volume of data is large, much time is cost for the processing of extracting data from the personal computer into the portable remote terminal and the processing of synchronizing the terminal with the personal computer which is conducted when data edging is executed on the portable remote terminal.
Secondly, in a conventional system, data in a data base is taken in into a portable remote terminal as it is to result in bringing out data that needs not to be brought out by the portable remote terminal as well, which hinders quick application of data when necessary data is actually referred to by the portable remote terminal.
Thirdly, since data taken in into a portable remote terminal should be synchronized with a host data base on a computer, the order of items of data on the portable remote terminal can not be changed by a user as required. This prevents efficient use of data.
Although Japanese Patent Laying-Open (Kokai) No. Heisei 5-89004 discloses a system of downloading a data base of a host computer into a portable remote terminal and uploading data updated offline by the portable remote terminal into the host computer in synchronization with the host computer, the system only provides synchronization of the data updated on the portable remote terminal based on user ID and fails to solve none of the above-described problems.
Also, the distributed data base management systems disclosed in the above-described Japanese Patent Laying-Open (Kokai) No. Heisei 8-305714 and Japanese Patent Laying-Open No. 2-58165 relate to a technique of providing synchronization of data bases dispersedly arranged at a plurality of sites connected through LAN, they recite none of a technique of bringing out a data base on a computer into a portable remote terminal to conduct reference/editing and synchronous processing as well.
SUMMARY OF THE INVENTION
A first object of the present invention is to provide a system for linking data between a personal computer and a portable remote terminal which enables execution of the processing of extracting data from the personal computer into the portable remote terminal and the processing of synchronizing the portable remote terminal with the personal computer in a short time period, and a data linking method therefor.
A second object of the present invention is to provide a system for linking data between a personal computer and a portable remote terminal which realizes quick application of data by selectively taking in data that needs to be brought out from a data base of the computer by the portable remote terminal, and a data linking method therefor.
A third object of the present invention is to provide a system for linking data between a personal computer and a portable remote terminal which enables the order of items of data taken in into the portable remote terminal to be changed by a user as required, thereby realizing efficient use of data, and a data linking method therefor.
According to the first aspect of the invention, a system for linking data between a computer and a portable remote terminal which extracts data of a host data base on the computer into the portable remote terminal, displays and edits the extracted data on the portable remote terminal and conducts synchronous processing of updated data in the portable remote terminal and a data base in the computer, wherein
the computer comprissing
means for selecting object data to be brought out from the host data base into the portable remote terminal and a record item of the object data,
means for creating on the portable remote terminal, with respect to selected object data, an item definition data base which defines a record attribute, an object storage data base which stores object data on a record basis correspondingly to the item definition data base, a relation definition data base which defines relations among object data stored in the object storage data base and a definition data base which defines relations among the respective data bases created,
means for writing, on the basis of a record taken out from the host data base, data into the corresponding one of the object storage data bases according to the item definition data base, and
synchronization means for conducting synchronous processing of reading updated data from the object storage data base of the portable remote terminal and writing the data into the host data base of the computer, and
the portable remote terminal comprising
means for conducting, when a record item of the object storage data base refers to other the object storage data base, link data solution processing based on a record attribute of the item definition data base, and
means for changing, when the display order of object data of the object storage data base is changed or when existence
on-existence of display is selected, the display order of object data of the item definition data base or an attribute indicative of existence
on-existence of display according to the contents of the change or the selection, and wherein
the synchronization means of the computer reads an updated record from the object storage data base of the portable remote terminal to update the host data base of the computer.
In the preferred construction, the portable remote terminal further
Kobayashi Osamu
Yoda Seiichi
Alam Shahid
Foley & Lardner
NEC Corporation
Vu Kim
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