System and method of synchronizing objects between two devices

• US 6,993,579 B2
• Filed: 12/01/2004
• Issued: 01/31/2006
• Est. Priority Date: 10/12/1998
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Wu, Charles
• Primary Examiner(s): Donaghue, Larry D.
• Application Number:
  US11/000,601
• Publication Number:
  US 20050076119A1
• Time in Patent Office: 426 Days
• Field of Search: 709220-225, 709/217, 709/219, 207/201, 207/203, 207/10, 717/168, 717/173, 710/5, 710/20
• US Class Current: 709/224
• CPC Class Codes: G06F 16/275 Synchronous replication
• CPC Class Codes: H04L 67/1095 Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
• 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: Y10S 707/99952 Coherency, e.g. same view to multiple users

Abstract

A synchronization system synchronizes objects between a portable computer and a desktop computer. The portable computer is capable of communicating with a storage volume that can become inaccessible to the portable computer. The system identifies storage volumes currently available to the portable computer and identifies storage volumes previously accessible to the portable computer, but not currently accessible to the portable computer. Objects contained in storage volumes that are currently accessible to the portable computer are then synchronized between the base computer and the portable computer. During the synchronization process, the system ignores objects stored on volumes that are not currently accessible to the portable computer. However, the system continues to monitor and record changes to objects stored on volumes that are not currently accessible to the portable computer. When a storage volume that was previously inaccessible becomes accessible, the system synchronizes objects stored on the previously inaccessible storage volume. The objects may be databases or other data structures. The storage volume that can become inaccessible to the portable computer is typically a removable memory card that can be inserted into the portable computer.

Claims

1. A synchronization manager for a portable computing device, comprising:

a volume identifier to identify storage volumes currently accessible to the portable computing device;

a connection sensor to determine when the portable computing device is connected to a second computing device;

a deletion identifier to determine, in response to sensing a connection with the second computing device, objects subject to deletion from the second computing device during a synchronization process to occur between the portable computing device and the second computing device; and

a blocker to prevent deletion of the objects subject to deletion during the synchronization process.

2. The synchronization manager as recited in claim 1, further comprising a synchronicity maintainer for immediately synchronizing an object contained in one of the storage volumes not coupled with the portable computing device in response to the storage volume becoming accessible to the portable computing device.

3. The synchronization manager as recited in claim 2, wherein at least one of the objects comprises a plurality of data items, and wherein the synchronicity maintainer synchronizes data items in the object.

4. The synchronization manager as recited in claim 3, wherein the object comprises a database.

5. The synchronization manager as recited in claim 1, wherein the storage volume that can become inaccessible to the portable computing device comprises a removable memory card.

6. The synchronization manager as recited in claim 1, wherein the storage volume that can become inaccessible to the portable computing device comprises a removable disk drive.

7. The synchronization manager as recited in claim 1, wherein the storage volume that can become inaccessible to the portable computing device comprises a removable flash drive.