HN	Head Node
WEMER	WEdge MERging
PEGASIS	Power Efficient Gathering in Sensor Information Systems
CCS	Concentric Clustering Scheme
MCDA	Multilayer Cluster Designing Algorithm
WSNs	Wireless Sensor Networks
BS	Base Station
RE	Residual Energy
EHP	Energy Hole Problem
ADRP	Adaptive Decentralized Re-clustering Protocol
CH	Cluster Head
MDC	mobile data collector
CCO	Cluster Coordinator
DCD	Distributed Cluster Designing
CCD	Centralized Cluster Designing
CCS	Concentric Clustering Scheme
CN	Corona Number
WN	Wedge Number
LL	Long link
TDMA	Time Division Multiple Access
FND	First Node Die
HND	Half Node Die
LND	Last Node Die
TND	10% Node Die
THND	30% Node Die