ERAA: Energy-Efficient Rate Adaptation Algorithm 141
dBm), (2 Mbps, 24 dBm) and (5.5 Mbps, 24 dBm), because 7 Mbps is already
higher than any other bit rate among them.
In view of this, we design a FDR-RSSI probing algorithm that can obtain
the FDR-RSSI mappings at minimum number of probing combinations, e.g.,
around 25 probing combinations in the above example. Algorithm 1 outlines
our approach. In the algorithm, A is the set of bit rates and B is the set
of adjustable txpower. C is the set of txpower probed and initially set as φ.
H is the collection of FDR for each probed combination. n is the number
of probing frames to be sent for each combination, and th is the customized
threshold of FDR. If FDR is less than th, the probing algorithm terminates. ...