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11. 发明授权

US06810254B2 Method and apparatus for performing mobile assisted hard handoff between communication systems 有权
标题翻译：用于在通信系统之间执行移动辅助硬切换的方法和装置
公开(公告)号：US06810254B2
公开(公告)日：2004-10-26
申请号：US09946910
申请日：2001-09-04
申请人： Edward G. Tiedemann, Jr. , Tao Chen , Charles E. Wheatley, III
发明人： Edward G. Tiedemann, Jr. , Tao Chen , Charles E. Wheatley, III
IPC分类号： H04Q722
CPC分类号： H04W36/0094 , H04W36/0061 , H04W36/0066 , H04W36/14 , H04W36/30 , Y02D70/00
摘要： A method and apparatus for performing inter-system hard handoff between communication systems or inter-frequency hard handoff within a CDMA communication system is disclosed. The purpose is to reduce the probability of dropped calls during inter-system hard handoff. In the event that a hard handoff attempt is unsuccessful, the mobile station will return to the original system with information which the communication system of the present invention uses to assist in the performance of future handoff attempts. Alternatively, with no handoff attempt made, the mobile station monitors the destination system then returns to the original system with information used to assist in subsequent handoff attempts. The information returned from monitoring a CDMA system consists of results of a search for one or more pilots given at offsets in a specific list provided to the mobile station by the base station or a set of offsets based upon a predetermined search algorithm.

12. 发明授权

US07391759B2 Method and apparatus for providing wireless communication system synchronization 有权
标题翻译：用于提供无线通信系统同步的方法和装置
公开(公告)号：US07391759B2
公开(公告)日：2008-06-24
申请号：US10383855
申请日：2003-03-07
申请人： Mark S. Wallace , Edward G. Tiedemann, Jr. , Charles E. Wheatley, III , J. Rod Walton , Steven J. Howard
发明人： Mark S. Wallace , Edward G. Tiedemann, Jr. , Charles E. Wheatley, III , J. Rod Walton , Steven J. Howard
IPC分类号： H04J3/06
CPC分类号： H04B7/2696
摘要： When insufficient traffic is present in the network to maintain synchronization in this manner, other methods must be used. One approach involves making direct measurements of the timing between base stations. This is accomplished in one of two ways. The base may interrupt its transmissions on all sectors for a short interval during which it determines the time of arrival of signals from other base stations. Given knowledge of the other base station locations, time errors relative to all other base stations may be derived. Alternatively, the base may send a short signal at high power in the mobile transmit band. This time-of-arrival of this signal is measured by the surrounding base stations and the time errors between pairs of base stations are computed. In some cases, a base station may be isolated sufficiently from all other base stations in the network such that direct base-to-base measurement is not viable. In this case, a fixed mobile is placed at a location in the handoff region between the isolated cell and another cell in the network. The fixed mobile either performs measurements of base station pilots on command of the base and reports the timing information, or sends a burst transmission at a specified time and power level to be measured by the base stations.
摘要翻译：当网络中不足够的流量以这种方式维持同步时，必须使用其他方法。一种方法包括对基站之间的定时进行直接测量。这是通过两种方式之一实现的。基站可以在所有扇区上中断其传输短时间间隔，在此期间它确定来自其他基站的信号的到达时间。鉴于其他基站位置的知识，可以导出相对于所有其他基站的时间误差。或者，基站可以在移动发射频带中以高功率发送短信号。该信号的到达时间由周围的基站测量，并且计算基站对之间的时间误差。在一些情况下，基站可以与网络中的所有其他基站充分隔离，使得直接基站到基站的测量是不可行的。在这种情况下，固定移动台被放置在隔离小区与网络中的另一小区之间的切换区域中的位置。固定移动台可以在基站的指令下执行基站导频的测量，并且报告定时信息，或者在由基站测量的指定时间和功率电平上发送突发传输。

13. 发明授权

US08184611B2 Mobile station assisted timing synchronization in a CDMA communication system 有权
标题翻译： CDMA通信系统中的移动台辅助定时同步
公开(公告)号：US08184611B2
公开(公告)日：2012-05-22
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
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。

14. 发明授权

US07295531B2 Mobile station assisted timing synchronization in a CDMA communication system 有权
标题翻译： CDMA通信系统中的移动台辅助定时同步
公开(公告)号：US07295531B2
公开(公告)日：2007-11-13
申请号：US09841893
申请日：2001-04-25
申请人： Charles E. Wheatley, III , Edward G. Tiedemann, Jr.
发明人： Charles E. Wheatley, III , Edward G. Tiedemann, Jr.
IPC分类号： H04Q7/00 , H04Q7/24 , H04J3/06
CPC分类号： H04B7/2687 , H04B1/7075 , H04B1/70753 , H04B1/7077 , H04B2201/70701 , H04B2201/70702 , H04J3/0682 , H04J13/00
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 and 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，从基站对从移动台到从基站的信号的发送之间的延迟的长度进行估计。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。

15. 发明授权

US06590881B1 Method and apparatus for providing wireless communication system synchronization 有权
公开(公告)号：US06590881B1
公开(公告)日：2003-07-08
申请号：US09206037
申请日：1998-12-04
申请人： Mark S. Wallace , Edward G. Tiedemann, Jr. , Charles E. Wheatley, III , J. Rod Walton , Steven J. Howard
发明人： Mark S. Wallace , Edward G. Tiedemann, Jr. , Charles E. Wheatley, III , J. Rod Walton , Steven J. Howard
IPC分类号： H04Q700
CPC分类号： H04B7/2696
摘要： When insufficient traffic is present in the network to maintain synchronization in this manner, other methods must be used. One approach involves making direct measurements of the timing between base stations. This is accomplished in one of two ways. The base may interrupt its transmissions on all sectors for a short interval during which it determines the time of arrival of signals from other base stations. Given knowledge of the other base station locations, time errors relative to all other base stations may be derived. Alternatively, the base may send a short signal at high power in the mobile transmit band. This time-of-arrival of this signal is measured by the surrounding base stations and the time errors between pairs of base stations are computed. In some cases, a base station may be isolated sufficiently from all other base stations in the network such that direct base-to-base measurement is not viable. In this case, a fixed mobile is placed at a location in the handoff region between the isolated cell and another cell in the network. The fixed mobile either performs measurements of base station pilots on command of the base and reports the timing information, or sends a burst transmission at a specified time and power level to be measured by the base stations.

16. 发明授权

US6151311A Mobile station assisted timing synchronization in a CDMA communication system 有权
标题翻译： CDMA通信系统中的移动台辅助定时同步
公开(公告)号：US6151311A
公开(公告)日：2000-11-21
申请号：US238125
申请日：1999-01-27
申请人： Charles E. Wheatley, III , Edward G. Tiedemann, Jr.
发明人： Charles E. Wheatley, III , Edward G. Tiedemann, Jr.
IPC分类号： H04B7/26 , H04B1/7075 , H04B1/7077 , H04J3/06 , H04W56/00 , H04W92/20
CPC分类号： H04J3/0682 , H04B1/7075 , H04B1/70753 , H04B1/7077 , H04W56/0015 , H04W56/0045 , H04B2201/70701 , H04B2201/70702 , 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 in the soft handoff region between the reference base station and the slave base station. First, the round trip delay between the mobile station and the reference base station is measured by the reference base station. Once the mobile station acquires the signal from the slave base station, it measures and reports the difference between the amount of time it takes a signal to travel from the reference base station to it and the amount of time it takes a signal to travel from the slave base station to it. The last measurement necessary is a measurement by the slave base station of the time difference between the time it received the reverse link signal from the mobile and station the time it transmitted a signal to the mobile station. A series of computations described in detail herein are performed upon the measured time values to determine the time difference between the slave base station and an adjustment of the slave base station timing is performed in accordance therewith.
摘要翻译：在本发明中，从基站通过从参考基站和从基站之间的软切换区域中由移动站发送和接收的消息与基准基站实现同步。首先，由参考基站测量移动站与参考基站之间的往返延迟。一旦移动站从从基站获取信号，它测量并报告从参考基站到其的行进信号所花费的时间量与从基准站到达的信号所需的时间量之间的差异从基站到它。最后一次测量是由从基站测量从移动站接收反向链路信号的时间与发送信号到移动台的时间之间的时间差。在测量的时间值上执行一系列计算，以确定从基站与从基站的调整之间的时间差根据其执行定时。

17. 发明授权

US5940761A Method and apparatus for performing mobile assisted hard handoff between communication systems 失效
公开(公告)号：US5940761A
公开(公告)日：1999-08-17
申请号：US784280
申请日：1997-01-15
申请人： Edward G. Tiedemann, Jr. , Tao Chen , Charles E. Wheatley, III
发明人： Edward G. Tiedemann, Jr. , Tao Chen , Charles E. Wheatley, III
IPC分类号： H04L12/28 , H04W36/14 , H04Q7/20
CPC分类号： H04W36/0094 , H04W36/0066 , H04W36/0061 , H04W36/14 , H04W36/30
摘要： A method and apparatus for performing inter-system hard handoff between communication systems or inter-frequency hard handoff within a CDMA communication system is disclosed. The purpose of this invention is to reduce the probability of dropped calls during inter-system hard handoff. In the event that a hard handoff attempt is unsuccessful, the mobile station will return to the original system with information which the communication system of the present invention uses to assist in the performance of future handoff attempts. Alternatively, with no handoff attempt made, the mobile station monitors the destination system then returns to the original system with information used to assist in subsequent handoff attempts. The information returned from monitoring a CDMA system consists of results of a search for one or more pilots given at offsets in a specific list provided to the mobile station by the base station or a set of offsets based upon a predetermined search algorithm.

18. 发明授权

US06307840B1 Mobile station assisted timing synchronization in CDMA communication system 失效
标题翻译：移动台辅助定时同步CDMA通信系统
公开(公告)号：US06307840B1
公开(公告)日：2001-10-23
申请号：US09008203
申请日：1998-01-16
申请人： Charles E. Wheatley, III , Edward G. Tiedemann, Jr.
发明人： Charles E. Wheatley, III , Edward G. Tiedemann, Jr.
IPC分类号： H04J306
CPC分类号： H04B7/2687 , H04B1/7075 , H04B1/70753 , H04B1/7077 , H04B2201/70701 , H04B2201/70702 , H04J3/0682 , H04J13/00
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 bsae station acquires the signal from the mobile station and determines when the signal from the mobile station arrives. The slave base station then makes and 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。从站台站从移动站获取信号，并确定何时来自移动站的信号到达。然后，从基站对从移动台到从基站的信号的发送之间的延迟的长度进行估计。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。

19. 发明授权

US06304755B1 Method and apparatus for performing mobile assisted hard handoff between communication systems 有权
标题翻译：用于在通信系统之间执行移动辅助硬切换的方法和装置
公开(公告)号：US06304755B1
公开(公告)日：2001-10-16
申请号：US09307878
申请日：1999-05-10
申请人： Edward G. Tiedemann, Jr. , Tao Chen , Charles E. Wheatley, III
发明人： Edward G. Tiedemann, Jr. , Tao Chen , Charles E. Wheatley, III
IPC分类号： H04Q738
CPC分类号： H04W36/0094 , H04W36/0061 , H04W36/0066 , H04W36/14 , H04W36/30 , Y02D70/00
摘要： A method and apparatus for performing inter-system hard handoff between communication systems or inter-frequency hard handoff within a CDMA communication system is disclosed. The purpose of this invention is to reduce the probability of dropped calls during inter-system hard handoff. In the event that a hard handoff attempt is unsuccessful, the mobile station will return to the original system with information which the communication system of the present invention uses to assist in the performance of future handoff attempts. Alternatively, with no handoff attempt made, the mobile station monitors the destination system then returns to the original system with information used to assist in subsequent handoff attempts. The information returned from monitoring a CDMA system consists of results of a search for one or more pilots given at offsets in a specific list provided to the mobile station by the base station or a set of offsets based upon a predetermined search algorithm.
摘要翻译：公开了一种用于在CDMA通信系统内进行通信系统之间的系统间硬切换或频间硬切换的方法和装置。本发明的目的是降低在系统间硬切换期间掉话的可能性。在硬切换尝试不成功的情况下，移动台将利用本发明的通信系统用于协助未来切换尝试的执行的信息返回到原始系统。或者，在没有进行切换尝试的情况下，移动台监视目的地系统，然后利用用于辅助随后的切换尝试的信息返回到原始系统。从监视CDMA系统返回的信息包括搜索由基站提供给移动台的特定列表中的偏移处给出的一个或多个导频的结果或基于预定搜索算法的一组偏移量的结果。

20. 发明授权

US5872774A Mobile station assisted timing synchronization in a CDMA communication system 失效
公开(公告)号：US5872774A
公开(公告)日：1999-02-16
申请号：US933888
申请日：1997-09-19
申请人： Charles E. Wheatley, III , Edward G. Tiedemann, Jr.
发明人： Charles E. Wheatley, III , Edward G. Tiedemann, Jr.
IPC分类号： H04B7/26 , H04B1/7075 , H04B1/7077 , H04J3/06 , H04W56/00 , H04W92/20
CPC分类号： H04J3/0682 , H04B1/7075 , H04B1/70753 , H04B1/7077 , H04W56/0015 , H04W56/0045 , H04B2201/70701 , H04B2201/70702 , 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 in the soft handoff region between the reference base station and the slave base station. First, the round trip delay between the mobile station and the reference base station is measured by the reference base station. Once the mobile station acquires the signal from the slave base station, it measures and reports the difference between the amount of time it takes a signal to travel from the reference base station to it and the amount of time it takes a signal to travel from the slave base station to it. The last measurement necessary is a measurement by the slave base station of the time difference between the time it received the reverse link signal from the mobile and station the time it transmitted a signal to the mobile station. A series of computations described in detail herein are performed upon the measured time values to determine the time difference between the slave base station and an adjustment of the slave base station timing is performed in accordance therewith.

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