Table 2.

Percentage gain in improved protocol, the fuzzy inspired energy-efficient protocol for heterogeneous wireless sensor network as compared to existing protocols.

Number of nodes dead	2-level SEP	3-level SEP	3-level DEEC
1% nodes dead	−11.19%	−10.07%	−50.38%
50% nodes dead	28.11%	23.89%	6.96%
80% nodes dead	27.17%	16.83%	10.32%
100% nodes dead	6.60%	1.60%	5.29%
Percentage area covered
1% nodes dead	5.58%	1.96%	5.19%
50% nodes dead	11.97%	1.22%	1.68%
80% nodes dead	26.66%	8.86%	9.72%
100% nodes dead	100%	12.89%	100%