H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 3/18 (2006.01) H04L 1/00 (2006.01) H04L 5/02 (2006.01)
Patent
CA 2314713
This invention relates to an extended politeness power cutback for both G.lite.bis and G.dmt.bis D/S and U/S signals, together with a G.hs.bis-defined maximum U/S and D/S transmit PSD levels. This latter is applied regardless the loop length and it is assumed to be based on MIB indications and on ATU-R and ATU-C characteristics. The rationale behind it is to both impose a general power consumption limitation and to limit interference into adjacent pairs (this being particularly important in DLC deployments). A G.hs.bis transaction (to be defined in future contributions) would exchange and negotiate the requirements coming from the operator (MIB- based) and from the ATUs. The extended politeness cutback can be applied on top of the max PSD limitation on short loops. For the ATU-C is ensures a statistical power savings over the served subscriber area without a significant data rate degradation. For U/S, it reduces the self FEXT into adjacent pairs, thus improving the throughput for the modems served by the same feeder cable. This feature could be disabled by the operator when in presence of a NEXT-limited environment. The contribution specifically refers to G.dmt.bis; some changes are required for G.lite.bis when in presence of a Fast Retrain Power cutback.
Ginesi Alberto
Mcclennon Scott
Tremblay Francois
Inc. Catena Networks Canada
Kirby Eades Gale Baker
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