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.fr/patents/US7295531?utm_source=gb-gplus-shareBrevet US7295531 - Mobile station assisted timing synchronization in a CDMA communication system
Mobile station assisted timing synchronization in a CDMA communication system