Hi all,
I am studying the source code of MultihopLQI, a multihop routing
protocol in TinyOS 2.1.0 (tos/lib/net/lqi). In its routing engine
(LqiRoutingEngineP.nc), the LQI value of beacon messages are adjusted
using the following function:
uint16_t adjustLQI(uint8_t val) {
uint16_t result = (80 - (val - 50));
result = (((result * result) >> 3) * result) >> 3;
return result;
}
The adjusted LQI value is used as the "cost" from current node to the
neighboring node from which the beacon message is sent.
I don't understand the reason of the adjustment. Could some one give
me some pointer about why the LQI value has to be adjusted before use?
Thanks,
Tao
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