A time synchronization method in a CDMA system for synchronizing the time of a plurality of base stations and the time of a base station controller that controls each of these base stations includes providing the base station controller with a GPS receiver for receiving a signal from GPS satellites and...http://www.google.com.tw/patents/US6483825?utm_source=gb-gplus-share專利 US6483825 - Time synchronization method in CDMA system