Node

CH

Explication

v

z

Node v selects z as CH because it has the lowest metric from its neighborhood. Therefore v becomes a simple node.

y

t

Node y selects t as CH because it has the lowest metric from its neighborhood. Therefore y becomes a simple node.

x

u

Node x selects u as CH because it has the lowest metric from its neighborhood. Therefore x becomes a simple node.

z

z

Node z becomes CH because it has the lowest metric from its neighborhood.

u

u

Node u becomes CH because it has the lowest metric from its neighborhood.

t

t

Even if node t does not have the lowest metric from its neighborhood (m(u) < m(t)), it becomes a CH because another node for instance y has already chose t as CH.