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    Time multiplexed transmission scheme for a spread spectrum communication system
    82.
    发明授权
    Time multiplexed transmission scheme for a spread spectrum communication system 失效
    用于扩频通信系统的时分复用传输方案

    公开(公告)号：US06888805B2

    公开(公告)日：2005-05-03

    申请号：US09816558

    申请日：2001-03-23

    申请人： Paul Bender ,  Ahmad Jalali ,  Bruce Judson ,  Roberto Padovani ,  Charles E. Wheatley, III

    发明人： Paul Bender ,  Ahmad Jalali ,  Bruce Judson ,  Roberto Padovani ,  Charles E. Wheatley, III

    IPC分类号： H04B7/26 ,  H04J3/00 ,  H04W16/02 ,  H04W16/12 ,  H04Q7/00 ,  H04B7/216 ,  H04Q7/20

    CPC分类号： H04W16/12 ,  H04B7/2618 ,  H04W16/02

    摘要： A “time multiplexed” transmission scheme capable of reducing the amount of interference from other cells operated at the same frequency band. Each cell in a system transmits in designated time intervals (e.g., time slots) during which other interfering cells may be prevented from transmitting. By temporarily “blanking” transmissions from interfering cells during the designated time slots, the amount of interference from these cells is reduced. The improved signal quality may support transmission at a desired or higher data rate, which may not be possible without cell blanking. In one variant, transmissions from the cells are staggered over different time slots. A set of one or more cells may be designated to transmit in each of a number of slot phases. The cells transmit in a staggered manner on these phases to reduce interference. The transmission scheme may be used for a various channel types (e.g., a control channel) and applications.

    摘要翻译： “时分复用”传输方案能够减少在相同频带上工作的其他小区的干扰量。 系统中的每个小区以指定的时间间隔（例如，时隙）发送，在该时间间隔期间可以防止其他干扰小区的发射。 通过在指定时隙期间暂时从干扰小区“消隐”传输，减少了来自这些小区的干扰量。 改进的信号质量可以支持以期望的或更高数据速率的传输，这在没有小区消隐的情况下可能是不可能的。 在一个变型中，来自小区的传输在不同的时隙上交错。 可以指定一组一个或多个小区在多个时隙相位中的每一个中进行发送。 小区在这些相位上以交错的方式发送以减少干扰。 传输方案可以用于各种信道类型（例如，控制信道）和应用。

    Method and apparatus for beam switching in a wireless communication system
    83.
    发明授权
    Method and apparatus for beam switching in a wireless communication system 失效
    用于无线通信系统中的波束切换的方法和装置

    公开(公告)号：US06751206B1

    公开(公告)日：2004-06-15

    申请号：US09608173

    申请日：2000-06-29

    申请人： Roberto Padovani ,  Paul E. Bender ,  Ahmad Jalali ,  Bruce Judson ,  Charles E. Wheatley, III

    发明人： Roberto Padovani ,  Paul E. Bender ,  Ahmad Jalali ,  Bruce Judson ,  Charles E. Wheatley, III

    IPC分类号： H04B7204

    CPC分类号： H04W16/12 ,  H04W16/02

    摘要： In a CDMA data communication system capable of variable rate transmission, utilization of beam switching techniques decreases the average interference caused by transmissions of a base station to subscriber stations within a cell, and in neighboring cells. Base stations utilize multiple transmit antennas, each transmitting signals at controlled amplitudes and phases, to form transmit signal corresponding to sector divisions. Data and reference signals are transmitted along sector division beams that alternate according to fixed time slots in order to increase system capacity and data rates by maximizing carrier-to-interference ratios (C/I) measured at subscriber stations.

    摘要翻译： 在能够进行可变速率传输的CDMA数据通信系统中，波束切换技术的利用减少了由基站向小区内和相邻小区中的用户台的传输引起的平均干扰。 基站利用多个发射天线，每个发射天线以受控的幅度和相位传输信号，以形成对应于扇区划分的发射信号。 数据和参考信号沿着根据固定时隙交替的扇区分波束传输，以通过最大化在用户台测量的载波干扰比（C / I）来增加系统容量和数据速率。

    Method and apparatus for providing wireless communication system synchronization
    85.
    发明授权
    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.

    Mobile station assisted timing synchronization in a CDMA communication system
    86.
    发明授权
    Mobile station assisted timing synchronization in a CDMA communication system 有权
    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。