Table 2.

Comparison between clustering schemes. GW: Gateway.

Scheme Name	Clustering Type	Clustering Overlapping	Gate Way	Location Awareness
Clustering-energy	Energy based	High	No	Not required
Clustering-energy-GW	Energy based	High	Yes	Not required
Clustering-k mean	K mean	Low	No	Required
Clustering-k mean-GW	K mean	Low	Yes	Required