| 摘要 |
The invention relates to a CDMA communication system (400) operating in a soft handover mode. In most cellular CDMA communication systems, operation in soft handover mode is controlled by downlink signal conditions. The current invention comprises means (413) for utilising an uplink signal quality such as a signal to interference ratio for determining the operation of, the system in handover. Specifically, a primary serving base station is selected as the base station having the best combined uplink and downlink performance thereby ensuring that efficient power control can be maintained. Furthermore, the subscriber unit (407) will enter a power up mode for base stations (403) having a low uplink signal quality wherein power control information from that base station (403) will be ignored. The invention is applicable to third generation wideband CDMA cellular communication systems. <IMAGE> |
