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    Method and apparatus for time division duplex pilot signal generation
    1.
    发明授权
    Method and apparatus for time division duplex pilot signal generation 失效
    用于时分双工导频信号产生的方法和装置

    公开(公告)号：US5680395A

    公开(公告)日：1997-10-21

    申请号：US515501

    申请日：1995-08-15

    申请人： Lindsay A. Weaver, Jr. ,  Gwain Bayley ,  Edward G. Tiedemann, Jr. ,  Klein S. Gilhousen

    发明人： Lindsay A. Weaver, Jr. ,  Gwain Bayley ,  Edward G. Tiedemann, Jr. ,  Klein S. Gilhousen

    IPC分类号： H04W36/14 ,  H04L27/32

    CPC分类号： H04W36/0066 ,  H04W48/12

    摘要： A method and apparatus for providing a reliable means to perform handoff from a code division multiple access (CDMA) system using a pilot signal to an alternative access technique system. Simple pilot box circuitry is added to a set of border base stations. The border base stations are base stations which operate only in the alternative access technique and which have coverage areas which are contiguous with coverage areas of CDMA operation base stations. The mobile unit monitors for the pilot signal from the border base stations in the same manner as it monitors for pilot signals from the CDMA operation base stations. When the mobile unit detects the pilot signal corresponding to a border base station, it notifies a system controller in accordance with standard operation. The system controller is aware that the pilot signal corresponds to a border base station and thus triggers a hard handoff process to the alternative access technique system in response thereto. The border base stations use a time division duplex technique to monitor a pilot and synchronization sequence from a neighboring one of the CDMA operation base stations to obtain an estimate of absolute system time.

    摘要翻译： 一种用于提供从使用导频信号到替代接入技术系统的码分多址（CDMA）系统执行切换的可靠装置的方法和装置。 简单的导频箱电路被添加到一组边界基站。 边界基站是仅在替代接入技术中工作的基站，其具有与CDMA操作基站的覆盖区域相邻的覆盖区域。 移动单元以与监视来自CDMA操作基站的导频信号相同的方式监视来自边界基站的导频信号。 当移动单元检测到与边界基站相对应的导频信号时，它根据标准操作通知系统控制器。 系统控制器知道导频信号对应于边界基站，并因此触发对另一种接入技术系统的硬切换过程。 边界基站使用时分双工技术来监视来自相邻的CDMA操作基站的导频和同步序列，以获得绝对系统时间的估计。

    Method and apparatus for providing mobile unit assisted hard handoff from a CDMA communication system to an alternative access communication system
    2.
    发明授权
    Method and apparatus for providing mobile unit assisted hard handoff from a CDMA communication system to an alternative access communication system 失效
    提供从CDMA通信系统到替代的接入通信系统的移动单元辅助硬切换的方法和装置

    公开(公告)号：US5594718A

    公开(公告)日：1997-01-14

    申请号：US413306

    申请日：1995-03-30

    申请人： Lindsay A. Weaver, Jr. ,  Gwain Bayley ,  Edward G. Tiedemann, Jr. ,  Klein S. Gilhousen

    发明人： Lindsay A. Weaver, Jr. ,  Gwain Bayley ,  Edward G. Tiedemann, Jr. ,  Klein S. Gilhousen

    IPC分类号： H04W36/14 ,  H04L27/30

    CPC分类号： H04W36/0066 ,  H04W48/12

    摘要： A method and system for providing a reliable means to perform handoff from a code division multiple access (CDMA) system using a pilot signal to an alternative access communication technique system. Simple pilot box circuitry is added to a set of border base stations. The border base stations are base stations which operate only in the alternative access communication technique and which have coverage areas which are contiguous with coverage areas of CDMA operation base stations. The mobile unit monitors for the pilot signal from the border base stations in the same manner as it monitors for pilot signals from the CDMA operation base stations. When the mobile unit detects the pilot signal corresponding to a border base station, it notifies a system controller in accordance with standard operation. The system controller is aware that the pilot signal corresponds to a border base station and thus triggers a hard handoff process to the alternative access communication technique system in response thereto.

    摘要翻译： 一种用于提供从使用导频信号的码分多址（CDMA）系统到替代的接入通信技术系统执行切换的可靠装置的方法和系统。 简单的导频箱电路被添加到一组边界基站。 边界基站是仅在替代接入通信技术中工作的基站，其具有与CDMA操作基站的覆盖区域相邻的覆盖区域。 移动单元以与监视来自CDMA操作基站的导频信号相同的方式监视来自边界基站的导频信号。 当移动单元检测到与边界基站相对应的导频信号时，它根据标准操作通知系统控制器。 系统控制器知道导频信号对应于边界基站，从而触发对其进行的替代接入通信技术系统的硬切换过程。

    Method and apparatus for testing a digital communication channel
    3.
    发明授权
    Method and apparatus for testing a digital communication channel 失效
    用于测试数字通信信道的方法和装置

    公开(公告)号：US5802105A

    公开(公告)日：1998-09-01

    申请号：US347526

    申请日：1994-11-30

    申请人： Edward G. Tiedemann, Jr. ,  Yu-Cheun Jou ,  Lindsay A. Weaver, Jr. ,  Gwain Bayley

    发明人： Edward G. Tiedemann, Jr. ,  Yu-Cheun Jou ,  Lindsay A. Weaver, Jr. ,  Gwain Bayley

    IPC分类号： H04L1/00 ,  H04B3/46 ,  H04B7/26 ,  H04B17/00 ,  H04L1/20 ,  H04L1/24 ,  H04L27/00 ,  H04L29/08 ,  H04L29/14

    CPC分类号： H04L1/20 ,  H04L1/241 ,  H04L1/242 ,  H04L2027/0034

    摘要： A system and method for testing signal transmission quality within a digital communication system is disclosed herein. The system may be incorporated within a digital cellular communication system in which information is exchanged over spread spectrum communication channels, among a plurality of mobile users, via at least one cell-site. The system contemplates testing a digital communication channel by transmitting a test sequence of digital data over the communication channel. The test sequence of digital data transmitted over the communication channel is received at a receiving station, within which is also generated a replica of the test sequence of digital data. The accuracy of transmission over the communication channel is then determined by comparing the replica of the test sequence of digital data to the test sequence of data received over the communication channel. The system allows the test sequence of digital data to be transmitted at one of a set of known data rates, with the receive station being disposed to identify the data rate associated with each test sequence of digital data. In a preferred implementation transmission of the test sequence involves generating a first plurality of data packets, which collectively comprise the test sequence of digital data. Each data packet is assigned one of a multiplicity of data rates in accordance with a first pseudorandom process, and is then transmitted at the data rate assigned thereto.

    摘要翻译： 本文公开了一种用于测试数字通信系统内的信号传输质量的系统和方法。 该系统可以并入到数字蜂窝通信系统中，其中通过至少一个小区站点在多个移动用户之间通过扩频通信信道交换信息。 该系统考虑通过在通信信道上发送数字数据的测试序列来测试数字通信信道。 通过通信信道发送的数字数据的测试序列在接收站处被接收，在接收站中也产生数字数据的测试序列的副本。 然后通过将数字数据的测试序列的副本与通过通信信道接收的数据的测试序列进行比较来确定通信信道上的传输的准确性。 该系统允许数字数据的测试序列以一组已知数据速率中的一种传输，其中接收站被设置为识别与数字数据的每个测试序列相关联的数据速率。 在优选实施例中，测试序列的传输涉及生成第一多个数据分组，其共同地包括数字数据的测试序列。 每个数据分组根据第一伪随机过程分配多个数据速率中的一个，然后以分配给它的数据速率发送。

    Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system
    4.
    发明授权
    Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system 失效
    用于减少在CDMA蜂窝通信系统中同时访问基站的移动站之间的消息冲突的装置和方法

    公开(公告)号：US07734260B2

    公开(公告)日：2010-06-08

    申请号：US11622383

    申请日：2007-01-11

    申请人： Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Roberto Padovani

    发明人： Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Roberto Padovani

    IPC分类号： H04B1/04

    CPC分类号： H04W74/0841 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/2628 ,  H04B2201/709709 ,  H04J13/0022 ,  H04J13/10 ,  H04J13/16 ,  H04L1/188 ,  H04L1/1887 ,  H04W52/48 ,  H04W52/50 ,  H04W74/002 ,  H04W74/08 ,  H04W74/0833 ,  H04W74/0866

    摘要： Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station in a CDMA system uses one or more randomization methods to distribute its transmissions. In the first randomization, the mobile station time-delays its transmissions by a number of chips of the PN code with which it spreads the transmitted signal. In a second randomization, the mobile station randomly selects the PN code. In a third randomization, the mobile station inserts a random delay between successive message transmissions or probes if it does not receive an acknowledgement after a predetermined timeout period. A predetermined number of such transmissions is called a probe sequence. In a fourth randomization, the mobile station inserts a relatively long random delay between successive probe sequences if it does not receive an acknowledgement of any probe in the sequence.

    摘要翻译： 通过在接收机的可用资源上分发传输来减少由多个扩频发射机同时发送的消息之间的冲突。 CDMA系统中的每个移动站使用一种或多种随机化方法来分发其传输。 在第一次随机化中，移动台通过PN码的多个码片对其发送进行时间延迟，并通过该芯片扩展发送的信号。 在第二随机化中，移动台随机选择PN码。 在第三次随机化中，如果移动台在预定的超时时段之后没有接收到确认，则在连续的消息传输或探测之间插入随机延迟。 预定数量的这种传输被称为探测序列。 在第四随机化中，如果移动台在序列中没有接收到任何探测器的确认，则在连续探测序列之间插入相对长的随机延迟。

    Alternating sequential half duplex communication system
    7.
    发明授权
    Alternating sequential half duplex communication system 失效
    交替顺序半双工通信系统

    公开(公告)号：US4979170A

    公开(公告)日：1990-12-18

    申请号：US145176

    申请日：1988-01-19

    申请人： Klein S. Gilhousen ,  Franklin P. Antonio ,  Irwin M. Jacobs ,  Lindsay A. Weaver, Jr.

    发明人： Klein S. Gilhousen ,  Franklin P. Antonio ,  Irwin M. Jacobs ,  Lindsay A. Weaver, Jr.

    IPC分类号： G02B6/293 ,  G02B6/34 ,  G02B6/42 ,  H01S3/08 ,  H01S5/14 ,  H01S5/40 ,  H04B1/7136 ,  H04B7/212 ,  H04B10/155 ,  H04L5/16

    CPC分类号： H04B1/7136 ,  G02B6/12007 ,  G02B6/2931 ,  G02B6/29328 ,  G02B6/29383 ,  G02B6/4206 ,  G02B6/4246 ,  G02B6/4249 ,  G02B6/425 ,  H01S3/08009 ,  H01S5/141 ,  H04B10/506 ,  H04B7/212 ,  H04L5/16 ,  G02B6/29334 ,  H01S5/4025 ,  H01S5/4062 ,  H01S5/4087

    摘要： A message communication system employing one or more centralized communication stations transferring messages through Earth orbit repeater satellites to or from mobile terminals with at least one central communication station having a first transceiver for transmitting a first communication signal to one or more mobile terminals and at least one mobile terminal having a second transceiver for receiving the first communication signal and demodulating it, and for transmitting at a predetermined duty cycle of the second transceiver, a second communication signal to at least one of the central communication stations. The preferred duty cycle over which the second communication signal is transmitted is about fifty percent of the second transceiver duty cycle. The communication system uses Time Division Multiplexed (TDM) communication signals using a number of channels as designated address channels with the remainder being used for data transfer. Information transmitted on the address channels is used by terminals to determine both the presence of a message and its corresponding data transmission or reception channel. In addition the terminals use the reception of the first communication signal to adjust return link transmission frequency to compensate for transmission path errors. The alternating duty cycle allows mobile terminals to use a single set of local oscillators for both transmission and reception modes of operation. To decrease interference with other systems the present system employs a power dispersal modulation function to achieve the footprint of a video signal for high transfer rate digital communication signals.

    摘要翻译： 一种消息通信系统，其采用一个或多个集中式通信站，其中至少一个中央通信站通过地​​球轨道中继卫星向移动终端传送消息，所述至少一个中央通信站具有用于将第一通信信号发送到一个或多个移动终端的第一收发器和至少一个 移动终端具有用于接收第一通信信号并对其进行解调的第二收发器，并且用于以第二收发器的预定占空比发送第二通信信号到至少一个中央通信站。 发送第二通信信号的优选占空比大约是第二收发器占空比的百分之五十。 通信系统使用时分复用（TDM）通信信号，使用多个信道作为指定地址信道，其余部分用于数据传输。 在地址信道上发送的信息被终端用于确定消息的存在及其对应的数据发送或接收信道。 此外，终端使用第一通信信号的接收来调整返回链路传输频率以补偿传输路径错误。 交替占空比允许移动终端在传输和接收操作模式下使用单组本地振荡器。 为了减少与其他系统的干扰，本系统采用功率分散调制功能来实现高传输速率数字通信信号的视频信号的覆盖区。

    Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system
    8.
    发明授权
    Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system 失效
    用于减少在CDMA蜂窝通信系统中同时访问基站的移动站之间的消息冲突的装置和方法

    公开(公告)号：US07426391B2

    公开(公告)日：2008-09-16

    申请号：US11622403

    申请日：2007-01-11

    申请人： Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Roberto Padovani

    发明人： Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Roberto Padovani

    IPC分类号： H04Q7/20

    CPC分类号： H04W74/0841 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/2628 ,  H04B2201/709709 ,  H04J13/0022 ,  H04J13/10 ,  H04J13/16 ,  H04L1/188 ,  H04L1/1887 ,  H04W52/48 ,  H04W52/50 ,  H04W74/002 ,  H04W74/08 ,  H04W74/0833 ,  H04W74/0866

    摘要： Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station in a CDMA system uses one or more randomization methods to distribute its transmissions. In the first randomization, the mobile station time-delays its transmissions by a number of chips of the PN code with which it spreads the transmitted signal. In a second randomization, the mobile station randomly selects the PN code. In a third randomization, the mobile station inserts a random delay between successive message transmissions or probes if it does not receive an acknowledgement after a predetermined timeout period. A predetermined number of such transmissions is called a probe sequence. In a fourth randomization, the mobile station inserts a relatively long random delay between successive probe sequences if it does not receive an acknowledgement of any probe in the sequence.

    摘要翻译： 通过在接收机的可用资源上分发传输来减少由多个扩频发射机同时发送的消息之间的冲突。 CDMA系统中的每个移动站使用一种或多种随机化方法来分发其传输。 在第一次随机化中，移动台通过PN码的多个码片对其发送进行时间延迟，并通过该芯片扩展发送的信号。 在第二随机化中，移动台随机选择PN码。 在第三随机化中，如果移动台在预定的超时时段之后没有接收到确认，则在连续的消息传输或探测之间插入随机延迟。 预定数量的这种传输被称为探测序列。 在第四随机化中，如果移动台在序列中没有接收到任何探测器的确认，则在连续探测序列之间插入相对长的随机延迟。

    Mobile station assisted soft handoff in a CDMA cellular communications system
    10.
    发明授权
    Mobile station assisted soft handoff in a CDMA cellular communications system 失效
    移动台在CDMA蜂窝通信系统中辅助软切换

    公开(公告)号：US5640414A

    公开(公告)日：1997-06-17

    申请号：US226222

    申请日：1994-04-11

    申请人： Robert D. Blakeney, II ,  Gadi Karmi ,  Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr.

    发明人： Robert D. Blakeney, II ,  Gadi Karmi ,  Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr.

    IPC分类号： H04W36/18 ,  H04W36/30 ,  H04K1/10

    CPC分类号： H04W36/18 ,  H04W36/30

    摘要： In a code division multiple access (CDMA) spread spectrum cellular communication system in which a mobile station user communicates with another system user via at least one base station, wherein each base station transmits a common pilot signal of a different code phase with respect to other base stations in said system, a method for directing communications between said mobile station user and said base stations. The mobile station monitors the signal strength of pilots and reports the measured signal strength to a system controller via the base station through which it is communicating. Command messages from the system controller to a new base station and the mobiles station establishes communication through the new base station in addition to the communication through the current base station. When the mobile station detects the falling below a predetermined level of the signal strength of a pilot corresponding to at least one of the base stations through which the mobile station is communicating, the mobile station reports the measured signal strength indicative of the corresponding base station to the system controller via the base stations through which it is communicating. Command messages from the system controller to the identified base station and the mobiles station terminates communication through the corresponding base station while communications through the other base station or base stations continue.

    摘要翻译： 在码分多址（CDMA）扩频蜂窝通信系统中，移动台用户经由至少一个基站与另一系统用户通信，其中每个基站相对于其他基站发送不同码相位的公共导频信号 所述系统中的基站，用于指导所述移动站用户与所述基站之间的通信的方法。 移动台监视导频的信号强度，并通过其正在通信的基站将系统控制器的测量信号强度报告给系统控制器。 除了通过当前基站的通信之外，从系统控制器到新基站和移动站的命令消息也建立通过新基站的通信。 当移动站检测到低于与移动台正在通信的至少一个基站相对应的导频的信号强度的预定级别的下降时，移动站将指示相应基站的测量信号强度报告给 系统控制器通过其正在通信的基站。 从系统控制器到所识别的基站和移动站的命令消息通过相应的基站终止通信，同时通过其他基站或基站的通信继续。