Process for multiple access and multiple transmission of data in a multi-user system for the point to multipoint digital transmission of data over the electricity network
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United States of America Patent
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-
Dec 2, 2008
Grant Date -
Jul 15, 2004
app pub date -
Oct 15, 2003
filing date -
Apr 19, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This process applies to a number of user kits (A, B, . . . X) and a head-end kit (1) communicating over the electricity network (2) using an upstream channel and a downstream channel. In essence, the process comprises accessing by multiple user kits (A, B, . . . X) in the upstream channel and the sending of multiple information frames by the head-end (1) in the downstream channel simultaneously applying OFDMA/TDMA/CDMA multiplexing and dynamically assigning each carrier so as to maximize transmission capacity in both the upstream and downstream channels. In turn, the process allows the adjustment of the quality of service according to the type of information and the user that requires the transmission and the dynamic allocation of bandwidth through constantly calculating the signal-to-noise ratio.
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