US 5,666,530 A · System for automatic synchronization of common file between portable computer and host computer via communication channel selected from a plurality of usable channels there between

Abstract

A handheld computer which contains an LCD display having a digitizing surface to allow pen input. Internal storage takes several forms, such as a large flash ROM area, battery-backed up RAM and an optional hard disk drive. Several alternative communication paths are available, such as the previously mentioned modem, a parallel printer port, a conventional serial port, a cradle assembly connected to the host computer, and various wireless short distance techniques such as radio frequency or infrared transmission. The computer can readily communicate with other sources, particularly to a host desktop computer, to allow automated synchronization of information between the host and the handheld system. Preferably the remote synchronization is performed at several user selectable levels. When the handheld computer is in a cradle and actively connected to the host computer, automatic capture of updated data in the host computer is performed. Several synchronization techniques are utilized to keep track of different types of files. In addition, while communication is established the handheld computer can enter a remote control mode, allowing the user access to files and applications not included in the handheld computer.

Claims14

Dependent claims

A portable computer for communication with a host computer, both the portable and host computers having a plurality of files including at least one common file, each computer having an independent copy of the common file, each computer capable of independently modifying its copy of the common file, the portable computer comprising:

means for automatically establishing a communications link with the host computer;
means for comparing the copies of the common file in the host computer and the portable computer when said communications link is established;
and
means for resolving any differences in the copies and for storing identical copies of the resolved common file in the host computer and the portable computer,
wherein said means for automatically establishing a communications link includes a plurality of communication channels usable by the portable computer and means for scanning said plurality of communication channels to establish said communications link and
wherein said means for automatically establishing a communications link further includes means for receiving approval from a user to establish said communications link before incurring a charge if said communications channel to be used includes a charge.

3 more elements

Dependencies are inferred from the claim text.

System for automatic synchronization of common file between portable computer and host computer via communication channel selected from a plurality of usable channels there between

Life of this patent

System for automatic synchronization of common file between portable computer and host computer via communication channel selected from a plurality of usable channels there between

Life of this patent

Abstract

Claims14