An Adaptive Approach to Discriminate the Persistence of Faults in Wireless Sensor Networks

Algorithm 2

Observation state.

(1)  Upon entering the observation state the node initializes the penalty

     counter 𝑧 and reword counter 𝑟 to one and zero respectively.

(2)  At each discrete time 𝑘𝑇 a node executes Algorithm 1.

(3)  if  Detected as faulty  then

(4)   Reset reward counter, that is, 𝑟=0.

(5)    if  FDD_𝑖≤FDD_𝑖−1  then

(6)      Increment the penalty counter by 𝜉, that is, 𝑧=𝑧+𝜉.

(7)    else

(8)      𝑧=𝑧+1.

(9)   𝐞𝐧𝐝𝐢𝐟

(10)  else  

(11)   Increment the reward counter, that is, 𝑟=𝑟+1.

(12)  𝐞𝐧𝐝𝐢𝐟

(13)  if  𝑟>𝜃₂ and 𝑧<𝜃₃  then

(14)    Node is reintegrated.

(15)  else

(16)    Node is isolated.

(17)  𝐞𝐧𝐝𝐢𝐟