Resource allocation method and device for power cognitive radio network

The invention discloses a resource allocation method and device for a power cognitive radio network. The method comprises the following steps: acquiring an error rate; calculating the first-time userequipment power according to the preset initial cost of the secondary user equipment, the initial power of the secondary user equipment, the penalty cost factor of the secondary user equipment and thebit error rate; calculating second-time user equipment power according to preset initial cost, a penalty cost factor, the first-time user equipment power and the bit error rate; when the first-time user equipment power is equal to the second-tim3 user equipment power, determining the second-time user equipment power as the optimal secondary user equipment power; calculating a first cost accordingto the second-time user equipment power, the secondary user equipment penalty cost factor and the bit error rate; and when the difference between the first cost and the initial cost is smaller than or equal to a preset value,