This is called cell breathing.

Traffic adaptive handover criteria, allowing "cell breathing"

Cell breathing may refer to:

Unlike in GSM, the cells' size is not constant (a phenomenon known as "cell breathing").

In CDMA-based systems, the effect of interference from other mobile transmitters in the same cell on coverage area is very marked and has a special name, cell breathing.

CDMA's "cell breathing" characteristic, where a terminal on the boundary of two congested cells will be unable to receive a clear signal, can often negate this advantage during peak periods.

Dynamic Channel Allocation (DCA) or Dynamic Frequency Selection (DFS) algorithms, allowing "cell breathing"

In CDMA-based mobile telephone systems, cell breathing is a mechanism which allows overloaded cells to offload subscriber traffic to neighbouring cells by changing the geographic size of their service area.