Service processing system with distributed data bases

• US 5,270,701 A
• Filed: 08/15/1991
• Issued: 12/14/1993
• Est. Priority Date: 03/08/1988
• Status: Expired due to Term

• Current Assignee: KDDI Corporation
• Original Assignee: Kokusai Denshi Denwa Company Limited (KDDI Corporation)
• Inventors: Yagi, Hikaru, Ito, Atsushi, Ikeda, Yoshikazu, Furuya, Nobuo, Fujioka, Masanobu
• Primary Examiner(s): Weldon, Ulysses
• Application Number:
  US07/746,200
• Time in Patent Office: 852 Days
• Field of Search: 340/825.03, 340/825.51, 340/825.52, 340/825.53, 379/210, 379/207, 379/211, 379/220, 379/221, 379/225, 379/230, 379/229, 364/200, 364/900, 364/137
• US Class Current: 709/213
• CPC Class Codes: H04M 3/4228 in networks
• CPC Class Codes: H04M 3/44 Additional connecting arrangements for providing access to frequently-wanted subscribers, e.g. abbreviated dialling at the subscriber's set H04M1/27; automatic redialling H04M3/424
• CPC Class Codes: H04Q 3/0016 Arrangements providing connection between exchanges

Abstract

A service processing system has a plurality of service processing nodes each having a single local data base, and a plurality of exchanges each of which is coupled user terminals. Said service processing nodes are coupled with one another through communication lines. A query by a user terminal is transferred to a local data base through an exchange to which the user terminal belongs. When a response to the query is stored in that data base, said response is directly given to the exchange from said local data base. On the other hand, when the local data base does not store the response the query of the user terminal is transferred to another service processing node which is designated by the local data base through the communication line between the service processing nodes. The response obtained in said other service processing node returns to the first local service processing node. Thus, the service to a user terminal is carried out by using a plurality of distributed data bases, each of which stores only local data.

Claims

1. A service process system, comprising:

a plurality of service areas, each of said service areas respectively having a service process node associated therewith, a data base associated therewith and operably connected to said associated service process node, at least one exchange device associated therewith and operably coupled to said service process node, and a plurality of user terminals associated therewith and operably coupled to said associated exchange device through a first communication line;

second communication lines operably coupling a plurality of said exchange devices within said service area; and

third communication lines operably coupling a plurality of said process nodes associated with said plurality of service areas,

wherein said service process node accesses said data base associated with said service area upon request by one of said user terminals, and obtains a response to a query by said one of said user terminals by reading out said data base associated with said service area,

wherein said data base associated with said service area stores at least a table of information relating to said associated service area and other information relating to location of other service areas containing information not in said associated service area,

wherein said service process node transfers said query to another one of said service process nodes when no response exists in said data base associated with said service area, and said service process node asks for a response to said query from said another one of said service process nodes,

wherein said another one of said service process node directly accesses yet another service process node without directly accessing said service process node when said yet another service process node has said response to said query and when said another one of said service process node lacks said response, and

wherein said another one of said service process node responds to said query through said third communication lines.

2. The service process system according to claim 1, wherein said another one of said service process node accesses yet another service process node having said response to said query when said another one of said service process node lacks said response.