Algorithm 1. IEE-LEACH

1. N-number of nodes, r-number of rounds.

2. The first step is to initialize the network parameters for WSN.

3. The second step is the random deployment of the nodes in the network.

4. The third step is the deployment of the BS in the network.

5. Calculate $d_{toBS}$

6. for $i=1$ to r

7. $E_a=E_t(1-\frac{r}{r_{max}})/n$

8. $p_i=p\ast n\ast E_r^i\ast E_i/(E_t\ast E_a)$

9. $T(s_i)=p_i/(1-p_i(rmod(1/p_i)))$

10. t=Random number

11. If $(t\le T(s_i))$

12. CH $\leftarrow n_i$

13. Calculate $d_{toCH}$

14. end if

15. if $(d_{toCH}<d_{toBS})$

16. Select CH and join the cluster;

17. else

18. Nodes do not participate in the cluster

19. end if

20. Transfer to BS

21. i=i+1

22. go to step 6

23. end