An example of DCC structure. The basic principle of DCC is shown in Figure 5.35(b). When BS2 reduces its pilot-signal transmission power (PP2), the cell boundary moves toward BS2. The area of BS2 decreases, and some MSs that were in the BS2 cell are reallocated to the BS1 cell. At the same time, MSs reconnected to BS1 increase their transmission power (TM) to meet the target power level of BS1 (SL1). This action, however, increases the interference with BS2. BS2 thus raises its target power leve