CEER divides a target area into sub-areas called grids such that all sensor nodes in a grid are within the radio range, and a cluster head is selected in each grid.

• CEER把整个目标区域分割成许多个子区域(网格)，使得每个在网格内的感测节点彼此都能在无线电范围内，然后每个网格都会选出一个丛集头。