In the present invention, the slave base station attains synchronization with the reference base station through messages transmitted from and received by a mobile station either in the soft handoff region between the reference base station and the slave base station or within a range which allows the...http://www.google.co.uk/patents/US6307840?utm_source=gb-gplus-sharePatent US6307840 - Mobile station assisted timing synchronization in CDMA communication system
