PHYSICAL CELL IDENTIFICATION ALLOCATION METHOD AND BASE STATION
The present invention describes a method of allocating physical cell identification (PCI) and a base station. The PCI allocation method includes the following steps: a target base station obtains a usable PCI list sent by an operations and maintenance function entity (OAM) and removes the target cells limited PCIs from the usable PCI list for obtain a selectable PCI set (step S102), the target base station obtains information from the Absolute Radio Frequency Channel Number (EARFCN) on the E-UTRA and from the neighboring cells of a service cell for an X2 interface message, and obtains a first PCI reference set by default, the cells EARFCN information in the first PCI reference set is different from that of the target cell of the target base station (step S014), the
target base station forms a second PCI reference set based on the intersection of the usable PCI list and the first PCI reference set (step S106), if the selectable pci set is empty, then one PCI is selected at random from the second set PCI as the target PCI (step S108). The success rate of allocating the PCI to the target cell is increased by the present invention.