$energ{y}_{di{r}_t}\left(dst\right)$	The energy needed to push the data directly to BS
$energ{y}_{ex{c}_t}\left(dst\right)$	The energy required for transferring the data through a neighboring node
$d_e$	Amount of power the intermediate relay nodes use during a data transfer.
$d_{dc}$	Amount of energy required for direct transfer of the data to BS.
$dst$	the distances measured among the corresponding node and the destination node
$n$	The adjacent nodes that facilitate the transmission of data.