
Symbol  Meaning 

L  Level of the constructed tree 
 Number of cluster heads at first level 
 Number of leaf node per cluster 
 Number of type 1 nodes which is dependent on value L 
 Number of type 2 nodes 
A  Area of the deployment area 
R  Radius of the deployment area 
b  Sensor data rate 
 Data rate of a node at level i 
 Total distance from all cluster members to cluster head 
 Characteristic distance 
 Single cluster energy consumption of data transmission at level i 
 Single cluster energy consumption of data aggregation at level i 
 Single cluster energy consumption of data transmission from level i to 
 Total energy consumption at level i 
E  Total energy consumption 
(·)  Function of energy consumption of data aggregation 
(·)  Function of data compression 
 Electronic energy consumption coefficient 
 Amplifier energy consumption coefficient 
 Coefficient of energy consumption of data aggregation 
 Data compression rate 
c  Data compression overhead 
p  Path attenuation exponent 
