Resource Scheduling Based on Unequal Clustering in Internet of Things

Table 1

Symbol representations of RSUC.

Symbol	Description
CHi	Cluster head i
CM	Cluster member
FL_CH	CHs of the first level
ECHi	Residual energy of CHi
D(CHi,BS)	Distance from CHi to BS
NBrni	Neighbors of ni
N_NBrCHi	Number of neighbor nodes of CHi
Cost(CHi,CHj)	Cost function of the CHi to CHj
RN_CHi	Relay node of CHi
CRN_CHi	Candidate relay node of CHi
CHi_hop	Number of hops from CHi to BS
Li	Level i, Lmax represents the highest level in the IoT
CHLi	The set of CH in Li
LCHi	Level of CHi
N_ CHLi	Number of CHs in set CHLi
N_CM	Number of cluster members
TN_CM	Threshold of number of cluster members
TD_CM	Amount of data in cluster member
S	Sending state
R	Receiving state
Ci	Channel i
TS_CHi	Time slot of CHi
TTS	Total time slot of intercluster communication
EOD_CHi	End of data in CHi