Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2004-09-09
2010-11-23
Harper, Vincent P (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S522000, C455S069000, C455S456100
Reexamination Certificate
active
07840220
ABSTRACT:
A communications system utilizes a forward error correction (FEC) regulation system in transmitting data to a mobile client. The FEC strength is regulated as a function of a mobile client location and channel statistics for the location. The communications system includes a server for providing the FEC, a channel statistics database for storing channel data for locations of the mobile client, and a map database. The FEC strength is based on mobile client position and channel performance statistics measured by the mobile client over a period of time and sent to the server or optionally on previously collected and stored channel statistics measurements for the mobile client position or predicted position. The collection of channel statistics is made with an automated system to create a channel statistics measurement database. The FEC strength is varied by modifying packet payload redundancy, packet time spreading, interleave characteristics and error coding rates.
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