Prediction method to maintain QoS in weather impacted wireless and satellite networks

Performance Evolution in Satellite Communication Networks Along with Markovian Channel Prediction

“…It is achieved by eliminating the accumu lated errorwhen co mpared to that of existing appro ximated ITU-Rsolution [13].…”

“…Thesecond equation (13) establishes relationship between an intermed iatevariable H with a known value of RA at a knownfrequency (f n ). Then the next equation (14)calcu lates RA atthe next frequency (f n+1 ).…”

“…Equation (12) establishes the relationship betweenRA and RR pr (see [13], [19]for full description).…”

“…This technique, estimates constituentcontributors of total attenuation separately and extends it togive good approximat ions for a wide range of signal frequencies,propagation angle, and RR pr . The technique uses ITU-Rcoefficients as shown in Figure 5 wh ile estimating the attenuationat grid locations in a weather collection map that was used by ITU-R. Incases where the location of concern does not fall on the grid, ab i-linear interpolat ion technique is then used to get the parameters [5] , [13].…”

“…Moreover,ITU-R techniques were developed at a time when the high frequencyoperations above Ku band, where losses become really significant,were not expected. Consequently, there was a greatroom to first improve the ITU-R techniques to maintain them accurateat higher frequency operations and second, to decouplethem fro m the fifteen years average data provided by ITUR.Instead, if we make ITU-R techniques work with real-t imeweather data, those techniques could help us achieve better operation,as they were helping us with the system design inthe past [13], [14], [17], and [19].…”