Journal of Sensors / 2017 / Article / Tab 1

Research Article

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

Table 1

Variable list.

Variable nameDescription

ET,X(k,d)Energy required to transmit k bits at distance d.
ER(k)Energy required to receive k bits.
EelecEnergy required to run transceiver circuitry.
εfsThe free space energy loss.
εmpThe multipath energy loss.
nTotal number of sensors.
naliveTotal number of alive sensors.
Er(i)Residual energy of ith sensor.
EmaxInitial maximum energy of a sensor node.
Distance of the nearest node to the BS.
MSide-length of M × M deployment area.
NCHDesired 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.

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