Efficient Payload Compression in IP-based Wireless Sensor Network: Algorithmic Analysis and Implementation

Algorithm 3

Algorithm for compression at sensor node level.

Procedure Compressdata

   ThresholdValue ← maximum tolerated value during a natural disaster assigned to sensors

   → “if a sensed data exceeds this value then we must take that into consideration”

   waitValue ← amount of time to wait before sending the compressed value

   While TRUE do

       SensedData ← sensing the environment

       If sensedData is greater than ThresholdValue then

           collectedData ← sensedData → “add the sensed data to the collection

           of data that are greater than the threshold”

       end If

       If startSensingTime is greater or equal to waitValue

          compressedData ← ArithmeticEncoding(collectedData)

          CompressdataSink (compressedData)

       end If

   end while

end Procedure