Algorithm 4. Node Dormancy Algorithm (Large Cluster of Unstable Period)

Inputs: (1) nodes of cluster C

(2) size of cluster C: NO

(3) number of surviving nodes: n

(4) optimal number of clusters: k

Result: dormant nodes of cluster C

1: for i = 1 → NO

2:   calculate the dormancy factor of node i, Sidor

3: end for

4: calculate node dormancy ratio, P

5: sort the dormancy factor set from small to large

6: put the nodes corresponding to the previous P dormancy factors into dormancy