Data communication system

• US 20020046285A1
• Filed: 09/25/2001
• Published: 04/18/2002
• Est. Priority Date: 09/25/2000
• Status: Abandoned Application

• Current Assignee: Pioneer Corporation
• Original Assignee: Pioneer Corporation
• Inventors: Yasushi, Mitsuo, Yanagidaira, Masatoshi
• Application Number:
  US09/961,280
• Publication Number:
  US 20020046285A1
• Time in Patent Office: Days
• US Class Current: 709/228
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04L 67/306 User profiles
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 4/00 Services specially adapted for wireless communication networks; Facilities therefor
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/14 Backbone network devices

Abstract

A data communication system in which a plurality of types of data related to a mobile unit is stored in a storage device provided in a mobile communication device, different update conditions have been previously held for each type of data, each of data stored in the storage device is transmitted to a server at a timing in accordance with an update condition for each type of data, and data sent to the server through a network line is received and written into a storage device of the server to update a database.

Claims

1. A data communication system comprising a server having a first storage device in which a database is formed, and a mobile communication device for connecting to said server through a network line, wherein:

said mobile communication device includes;

a second storage device for storing a plurality of data signals each having different data types related to a mobile unit;

update condition holding means for previously holding an update condition for each of the data types; and

transmitting means for transmitting each of the data signals stored in said second storage device at a timing corresponding to an update condition held in said update condition holding means for each of the data types, and

said server includes means for receiving a data signal transmitted from said transmitting means through said network line and for writing the received data signal into said first storage device to update the database.

2. A data communication system according to claim 1, wherein said update condition holding means holds an update cycle for each of the data types as the update condition.

3. A communication system according to claim 2, wherein as contents of a data type change in a shorter time, the update cycle of the data type is shorter.

4. A database updating method for updating a database in a data communication system which includes a server having a first storage device in which a database is formed, and a mobile communication device for connecting to said server through a network line, said method comprising the steps of:

storing a plurality of data signals each having different data types related to a mobile unit in a second storage device provided in said mobile communication device;

previously holding an update condition for each of the data types;

transmitting each of the data signals stored in said second storage device at a timing corresponding to an update condition for each of the data types; and

receiving a data signal sent to said server through said network line, and writing the received data signal into said first storage device to update the database.

5. A mobile communication device for connecting to a server having a first storage device in which a database is formed, through a network line, comprising:

a second storage device for storing a plurality of data signals each having different data types related to a mobile unit;

update condition holding means for previously holding an update conditions for each of the data types; and

transmitting means for transmitting each of the data signals stored in said second storage device at a timing corresponding to an update condition held in said update condition holding means for each of the data types.