Table 1 Major parameters and variables
From: Channel hopping scheme to mitigate jamming attacks in wireless LANs
Notations | Meaning |
|---|---|
δ 0 | Clear channel assessment (CCA) level for 802.11g |
S | Adjusted RSS value, i.e., summation of its own transmission power and received signal strength |
δ | Group size, i.e., a margin to determine the similarity between two different RSS values |
Tx(i,j) | Transmission power of node i for the jth packet |
Rx(k,l) | Received signal strength of the lth packet measured at node k |
∆ | Channel switching time (= channel sojourn time = time slot) |
C n | Channel number in the nth time slot |
c | Number of available channels in 802.11g |
r on | Average traffic rate during the time slot where the AP and a user node stays on the same channel |
r a ran | Average throughput when the AP and the user node randomly select the next channel |
r a sel | Average throughput when the AP and the user node select the next channel according to our proposed scheme |
p e | Channel disagreement probability, i.e., probability that the AP and a user node select different next channel numbers under the condition they stay on the same channel in the current time slot |
p a | Probability that the AP and the user node select the same next channel number under the condition that they stay on different channels in the current time slot |