Synchronization is effected in a cellular telecommunications network between a timing unit located at control node (e.g., RNC) of the network and a slave timing unit (STU) located at a controlled node (e.g., base station) of the network. Upon determining that a synchronization adjustment of the slave...http://www.google.com.tw/patents/US6577872?utm_source=gb-gplus-share專利 US6577872 - Base station oscillator regulation independent of transport network clocks in cellular telecommunications network
