| 摘要 |
In a cellular telecommunications network, a method and a cell radio controller for reducing Out Of Band radio Emissions (OOBEs) generated by cellular transmissions into downlink radio channels of a coexisting radio network, such as the police radio network. The invention detects an uplink transmission of the coexistent network radio terminal, and measures its transmitting power level. If the power level exceeds a predetermined threshold, then the downlink radio channel associated with the radio transmission is determined, and further it is determined the cellular downlink channels that create OOBEs that interfere with the downlink radio channel of the coexistent system. Then, the level of OOBEs of the cellular downlink channels are determined, and if at least one exceeds a tolerable OOBE threshold level, the OOBEs of that cellular downlink channel are reduced, by handing over the cellular downlink channel to another cellular downlink channel being more distant in frequency with respect to the coexistent radio network downlink channel, by terminating the cellular call involving the cellular downlink channel, or by reducing the maximum power level of the cellular downlink channel transmission. According to another embodiment, after the downlink radio channel associated with the radio transmission is determined, the method detects all cellular uplink channels in use in the same direction of arrival as the coexistent network radio terminal, determines the level of OOBE generated by the all cellular uplink channels in use, and if at least one of the levels of OOBEs exceeds a predefined threshold level, reduces the OOBE of that cellular uplink channels by handing over the cellular uplink channel to another cellular uplink channel being more distant in frequency with respect to the coexistent radio network downlink channel, by terminating the cellular call involving the cellular uplink channel, or by reducing the maximum power level of the cellular uplink channel transmission. |
