VCH-ECCR: A Centralized Routing Protocol for Wireless Sensor Networks

Table 1

Variable list.

Variable name	Description
ET,X(k,d)	Energy required to transmit k bits at distance d.
ER(k)	Energy required to receive k bits.
Eelec	Energy required to run transceiver circuitry.
εfs	The free space energy loss.
εmp	The multipath energy loss.
n	Total number of sensors.
nalive	Total number of alive sensors.
Er(i)	Residual energy of ith sensor.
Emax	Initial maximum energy of a sensor node.
	Distance of the nearest node to the BS.
M	Side-length of M × M deployment area.
NCH	Desired number of CHs.
C(c)	cth cluster where c:1, 2, … , NCH.
NC(c)	Total numbers of members in cluster C(c).
Eavg (C(c))	Average node energy in cluster C(c).
ANDCenC(c)	Average node distance in cth cluster from its centroid.
DCen(j)	Distance of jth member node from the cluster centroid.