Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Reexamination Certificate
2004-04-27
2009-11-10
Nguyen, Duc (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
C455S436000, C455S442000, C455S522000, C375S224000, C375S227000, C375S228000, C702S057000, C702S060000, C702S075000, C702S081000, C702S084000
Reexamination Certificate
active
07616927
ABSTRACT:
One or more median filter circuits are used to filter radio link control measurements corresponding to one or more radio link parameters of interest, such as received signal quality or round trip delay measurements, such as might be used by a base station to trigger mobile station handoff. As such measurements are particularly susceptible to measurement outliers arising from rapid but short-lived changes in radio link propagation paths, for example, the application of median filtering to such measurements is particularly advantageous. That is, by operation of median filtering, which is a non-linear filtering process, outliers in a stream of control measurements, such as are caused by instantaneous changes in channel fading or other propagation phenomena, are discarded rather than averaged in with the other measurements. Non-linear filtering as implemented by exemplary median filtering does not impair or otherwise limit the bandwidth of the underlying control measurements.
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Coats & Bennett P.L.L.C.
Lu Zhiyu
Nguyen Duc
Telefonaktiebolaget LM Ericsson (publ)
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