Multiplex communications – Communication over free space – Combining or distributing information via time channels
Reexamination Certificate
2005-06-07
2009-10-13
Maung, Nay A (Department: 2618)
Multiplex communications
Communication over free space
Combining or distributing information via time channels
C370S331000, C370S352000, C370S401000, C709S203000, C709S206000, C709S207000
Reexamination Certificate
active
07602765
ABSTRACT:
The present invention is related to synchronizing status information of an IMPS client in a wireless communication system. A server, which manages status information using version information, compares status information of contacts stored in association with version information received from a client to current status information. The server transmits changed status information to the corresponding client. Preferably, the server stores the current status information in association with new version information and informs the client about the new version information. The server stores at least two of the latest version information and respective status information. Accordingly, when a status information response message is lost in its transmission and the server receives a request for the status information from the client, the changed status information can be obtained.
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Wireless Village: “The Mobile IMPS Initiative, Client-Server Protocol, Sessions and Transactions, Version 1.1” Online! Jul. 31, 2002, pp. 1-92, retrieved from http://www.openmobilealliance.org/tech/affiliates/wv/wvindex.html, on Sep. 1, 2005.
Lee Hong Degerman Kang & Waimey
LG Electronics Inc.
Maung Nay A
Nguyen Tuan H
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