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21. 发明申请

US20080285539A1 MOBILE STATION ASSISTED TIMING SYNCHRONIZATION IN A CDMA COMMUNICATION SYSTEM 有权
标题翻译：移动站在CDMA通信系统中辅助定时同步
公开(公告)号：US20080285539A1
公开(公告)日：2008-11-20
申请号：US11939455
申请日：2007-11-13
申请人： Edward G. Tiedemann, JR. , Charles E. Wheatley III
发明人： Edward G. Tiedemann, JR. , Charles E. Wheatley III
IPC分类号： H04J3/06 , H04Q7/00
CPC分类号： H04J3/0682 , H04B1/7075 , H04B1/70753 , H04B1/7077 , H04B2201/70701 , H04B2201/70702 , H04W56/0015 , H04W56/0045 , H04W92/20
摘要： 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 mobile station to communicate with the slave base station. When the mobile station is not in communication with both the reference base station and the slave base station, then the round trip delay between the mobile station and the reference base station is measured by the reference base station. The reference base station communicates the PN code used by the mobile station over the reverse link to the slave base station. The slave base station acquires the signal from the mobile station and determines when the signal from the mobile station arrives. The slave base station then makes an estimate as to the length of the delay between transmission of a signal from the mobile station to the slave base station. Based upon these measurements and estimates, the slave base station determines the error which is present in the slave base station system time.
摘要翻译：在本发明中，从基站通过在参考基站和从基站之间的软切换区域内或在允许移动台的范围内由移动站发送和接收的消息与基准基站实现同步站与从站基站进行通信。当移动台不与参考基站和从基站进行通信时，由参考基站测量移动台与参考基站之间的往返延迟。参考基站通过反向链路将由移动站使用的PN码传送到从基站。从基站从移动台获取信号，并确定何时来自移动台的信号到达。然后，从基站估计关于从移动台到从基站的信号的发送之间的延迟的长度。基于这些测量和估计，从基站确定从基站系统时间中存在的错误。

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