公开(公告)号：US20050054366A1

公开(公告)日：2005-03-10

申请号：US10968788

申请日：2004-10-18

申请人： Tao Chen ,  Jack Holtzman ,  Leonid Razoumov ,  Shimman Patel ,  Keith Saints ,  Edward Tiedemann

发明人： Tao Chen ,  Jack Holtzman ,  Leonid Razoumov ,  Shimman Patel ,  Keith Saints ,  Edward Tiedemann

IPC分类号： H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04L1/06 ,  H04Q7/20

CPC分类号： H04W52/362 ,  H04W52/12 ,  H04W52/40

摘要： Method and apparatus for adjusting the transmission power of base stations in simultaneous communication with a mobile station. The methods described provide for the transmission power of the base stations to be aligned. In the first exemplary embodiment, the transmitters are attached to a separate control unit through communication links. The control unit then derives the most likely command stream and send that to the base stations. In the second exemplary embodiment, the control unit periodically receives the final or average transmit level in a period and an aggregate quality measure for the feedback during a period from each of the transmitters. The control unit determines the aligned power level and transmits a message indicative of the aligned power level to the transmitters.

摘要翻译： 用于调整与移动台同时通信的基站的发射功率的方法和装置。 所描述的方法提供了要对准的基站的发射功率。 在第一示例性实施例中，发射机通过通信链路附接到单独的控制单元。 控制单元然后导出最可能的命令流并将其发送到基站。 在第二示例性实施例中，控制单元在每个发射机的周期期间周期性地接收一段时间内的最终或平均发送电平以及用于反馈的总体质量度量。 控制单元确定对准的功率电平，并将指示对准的功率电平的消息发送到发射机。

公开(公告)号：US20050002348A1

公开(公告)日：2005-01-06

申请号：US10901881

申请日：2004-07-28

申请人： Jack Holtzman ,  Tao Chen ,  Leonid Razoumov

发明人： Jack Holtzman ,  Tao Chen ,  Leonid Razoumov

IPC分类号： H04B7/005 ,  H04B7/26 ,  H04J3/00

CPC分类号： H04W52/267 ,  H04W52/60

摘要： Method and apparatus for controlling transmission power in a closed loop power control system, wherein power control commands are based on the energy of the previous power control commands. In one embodiment, the method compares changes in the received energy of received power control commands against expected changes in those commands based on previously transmitted power control commands, and identifies suspicious responses to said previously transmitted power control commands. Hypothesis testing of the received power control commands is performed accordance any identified suspicious responses.

摘要翻译： 用于控制闭环功率控制系统中的发射功率的方法和装置，其中功率控制命令基于先前功率控制命令的能量。 在一个实施例中，该方法基于先前发送的功率控制命令来比较接收到的功率控制命令的接收能量的变化与这些命令中的预期变化，并且识别对先前发送的功率控制命令的可疑响应。 接收到的功率控制命令的假设检验是根据任何确定的可疑响应进行的。

公开(公告)号：US20050003848A1

公开(公告)日：2005-01-06

申请号：US10889808

申请日：2004-07-12

申请人： Tao Chen ,  Jack Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles Wheatley

发明人： Tao Chen ,  Jack Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles Wheatley

IPC分类号： H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04L1/20 ,  G05B9/02 ,  H04B7/00

CPC分类号： H04W52/12 ,  H04L1/0051 ,  H04L1/0066 ,  H04L1/208 ,  H04W52/20 ,  H04W52/36

摘要： Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power surplus/deficit indicative of the difference between the received signal quality and the setpoint, setpoint surplus/deficit indicative of the difference between the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics may include re-encoded symbol error rate, re-encoded power metric, modified Yamamoto metric, minimum or average LLR among decoded bits, number of decoding iterations, and possibly others. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.

摘要翻译： 调整无线通信系统中功率控制回路设定值的技术。 可以基于指示擦除/良好解码帧的帧状态来调整设定点，指示解码结果的置信度的一个或多个（通常是软的）度量，指示接收到的信号质量和设定点之间的差异的功率余量/ ，表示设定值与所需性能水平所需的阈值Eb / Nt之间的差异的设定值剩余/缺失，或其组合。 度量可以包括重新编码的符号错误率，重新编码的功率度量，修改的Yamamoto度量，解码比特中的最小或平均LLR，解码迭代次数，以及可能的其他值。 可以根据上述因素以不同的方式和/或不同的量调节设定点。 这些技术可以用于CDMA系统中的前向和/或反向链路。

公开(公告)号：US20050129063A1

公开(公告)日：2005-06-16

申请号：US11040743

申请日：2005-01-21

申请人： Leonid Razoumov ,  Jack Holtzman

发明人： Leonid Razoumov ,  Jack Holtzman

IPC分类号： H04L29/06 ,  H04L1/00 ,  H04M11/00 ,  H04W16/14 ,  H04W72/10 ,  H04W72/12 ,  H04W74/00 ,  H04J3/16

CPC分类号： H04W72/1247 ,  H04L1/0002 ,  H04L1/0018 ,  H04L1/0025 ,  H04L1/0026

摘要： A method (18) for scheduling packet data transmissions in a wireless communication system wherein a per-user Priority Function (PF) (24) is based on a channel condition indicated by a Rate Request Indicator (RRI). The method also considers fairness criteria dictated by predetermined Quality of Service (QOS) requirements. In one embodiment, the rate request indicator is a Data Rate Request (DRR). In another embodiment, the rate request indicator is Carrier-to-Interference (C/I) information. In the exemplary embodiment, the base station calculates a Priority Function (PF) for the multiple mobile users. Each PF is a function of the rate request indicator and the projected throughput of a given mobile user. The PF values allow the base station to schedule active mobile units having pending data. The scheduling produces an approximately equal share of the allocated transmission time to the multiple mobile stations.

摘要翻译： 一种用于在无线通信系统中调度分组数据传输的方法（18），其中每用户优先级功能（PF）（24）基于由速率请求指示符（RRI）指示的信道状况。 该方法还考虑了由预定的服务质量（QOS）要求所规定的公平性标准。 在一个实施例中，速率请求指示符是数据速率请求（DRR）。 在另一个实施例中，速率请求指示符是载波到干扰（C / I）信息。 在示例性实施例中，基站计算多个移动用户的优先级功能（PF）。 每个PF是速率请求指示符和给定移动用户的预计吞吐量的函数。 PF值允许基站调度具有未决数据的活动移动单元。 调度产生与多个移动站的分配的传输时间的近似相等的份额。

公开(公告)号：US06351650B1

公开(公告)日：2002-02-26

申请号：US09239187

申请日：1999-01-28

申请人： Stein A. Lundby ,  Leonid Razoumov ,  Jack Holtzman

发明人： Stein A. Lundby ,  Leonid Razoumov ,  Jack Holtzman

IPC分类号： H04Q720

CPC分类号： H04W52/221 ,  H04W52/226 ,  H04W52/40

摘要： Forward power control during a soft handoff in a wireless communication system is accomplished by tracking each power command (PC) transmitted from a mobile unit to two or more base station transceiver systems (BTSs). Each BTS may interpret power commands differently due to noise. However, the power commands are relayed to a selector along with additional data transmitted in a conventional fashion. The selector determines the power levels of each BTS and transmits power charge commands to maintain power balance between the BTSs. The BTSs may transmit each PC command to the selector or accumulate several PC commands and send a PC history to the selector. The selector generates a reference PC history, which may be one of the PC histories transmitted from a BTS, a combination thereof, the result of data processing on the one or more PC histories. Individual power change commands or the reference PC history is transmitted back to the BTS to adjust the transmitter output level of each BTS so that the BTSs are transmitting at compatible signal levels.

摘要翻译： 通过将从移动单元发送的每个功率命令（PC）跟踪到两个或更多个基站收发器系统（BTS）来实现在无线通信系统中的软切换期间的前向功率控制。 每个BTS可能由于噪声而不同地解释功率指令。 然而，功率命令与以常规方式发送的附加数据一起被中继到选择器。 选择器确定每个BTS的功率电平，并发送功率电荷命令以维持BTS之间的功率平衡。 BTS可以将每个PC命令发送到选择器，或者累积几个PC命令并将PC历史发送给选择器。 选择器产生参考PC历史，其可以是从BTS发送的PC历史之一，其组合，对一个或多个PC历史的数据处理结果。 单独的电力变化命令或参考PC历史被发送回BTS以调整每个BTS的发射机输出电平，使得BTS以兼容的信号电平进行发射。

公开(公告)号：US06310869B1

公开(公告)日：2001-10-30

申请号：US09144402

申请日：1998-08-31

申请人： Jack Holtzman ,  Daisuke Terasawa ,  Leonid Razoumov

发明人： Jack Holtzman ,  Daisuke Terasawa ,  Leonid Razoumov

IPC分类号： H04J1300

CPC分类号： H04W52/04 ,  H04B1/707 ,  H04B1/7103 ,  H04B2201/70701 ,  H04B2201/70706 ,  H04J13/004 ,  H04J13/0048 ,  H04J13/12 ,  H04L27/2615 ,  H04L2025/03777

摘要： Several methods and corresponding apparatus reduce peak to average power in signals transmitted in a wireless communications system, particularly with respect to pilot symbols transmitted from a base station to several user stations. A large peak to average amplitude of inserted pilot symbols has been found to result from a common sign chip position that exists in orthogonal codes, such as Walsh codes. In a first embodiment, the Walsh codes are multiplied by a random value of ±1. Under a second embodiment, the common sign chip position is eliminated in each Walsh code. The user station then inserts the missing chip position to regain orthogonality. In a third embodiment, the base station transmits pilot symbols, on a separate pilot channel, in only symbol positions that user stations expect to find pilot symbols. Under a fourth embodiment, each Walsh code is randomly shifted.

摘要翻译： 几种方法和相应的装置减少了在无线通信系统中发送的信号中的峰均功率，特别是关于从基站发送到若干用户站的导频符号。 已经发现插入的导频符号的峰值到平均幅度大的是由诸如沃尔什码之类的正交码中存在的公共符号码片位置产生的。 在第一实施例中，沃尔什码乘以±1的随机值。 在第二实施例中，在每个沃尔什码中消除了共用码片位置。 然后用户站插入丢失的芯片位置以重新获得正交性。 在第三实施例中，基站在单独的导频信道上仅发送用户站希望找到导频符号的符号位置的导频符号。 在第四实施例中，每个沃尔什码随机移位。

公开(公告)号：US06771700B1

公开(公告)日：2004-08-03

申请号：US09426016

申请日：1999-10-22

申请人： Leonid Razoumov ,  Jack Holtzman ,  Stein A. Lundby

发明人： Leonid Razoumov ,  Jack Holtzman ,  Stein A. Lundby

IPC分类号： H04B345

CPC分类号： H04L1/1816 ,  H04L1/0026 ,  H04L1/1607 ,  H04L1/1825 ,  H04L1/1867 ,  H04W52/20 ,  H04W52/50

摘要： Method and apparatus for transmitting a signal at a predetermined level of reliability using retransmission of erroneously transmitted frames so as to minimize total transmission energy. The transmitting station evaluates the frame error rate (FER) as a function of energy. Next, the transmitting station determines a combination of initial transmission energies and retransmission energies that will provide the target level of reliability while minimizing the total transmission energy employed in the initial transmission and the retransmissions. The transmitting station transmits a frame with an initial transmission energy. Employing conventional feedback methods the transmitting station is alerted to the occurrence of frame errors at the receiving station. The transmitting station upon notification of a frame error retransmits the frame with an energy determined to minimize the total energy required to transmit the frame with a predetermined level of reliability.

摘要翻译： 用于通过重发错误发送的帧来以预定的可靠性水平发送信号的方法和装置，以便最小化总传输能量。 发送站评估作为能量的函数的帧错误率（FER）。 接下来，发射站确定将提供目标可靠性水平的初始发射能量和重发能量的组合，同时最小化在初始传输和重传中使用的总传输能量。 发送站发送具有初始发送能量的帧。 采用传统的反馈方法，发送站在接收站发出帧错误。 在通知帧错误时，发送站以所确定的能量重新发送帧，以最小化以预定的可靠性水平发送帧所需的总能量。

公开(公告)号：US20080013494A1

公开(公告)日：2008-01-17

申请号：US11768863

申请日：2007-06-26

申请人： Stein Lundby ,  Edward Tiedemann ,  Jack Holtzman ,  Daisuke Terasawa

发明人： Stein Lundby ,  Edward Tiedemann ,  Jack Holtzman ,  Daisuke Terasawa

IPC分类号： H04Q7/00

CPC分类号： H04W52/36 ,  H04B1/707 ,  H04B2201/70706 ,  H04B2201/709709

摘要： The invention is a method for limiting the peak transmit power in a CDMA communication system. At least one of first and second high transmit power regions are separated into a plurality of high transmit power subregions. The high transmit power subregions of the plurality of high subregions are shifted by time offsets of differing durations to provide a plurality of time offset subregions. First and second low transmit power regions are also provided. At least one of the first and second low transmit power regions is also separated into a plurality of transmit power subregions and the low transmit power subregions are shifted by time offsets of differing time durations. The subregions can be time offset by a predetermined time duration or by a random time duration.

摘要翻译： 本发明是限制CDMA通信系统中的峰值发射功率的方法。 第一和第二高发射功率区域中的至少一个被分离成多个高发射功率子区域。 多个高次区域中的高发射功率子区域被不同持续时间的时间偏移移位以提供多个时间偏移子区域。 还提供了第一和第二低发射功率区域。 第一和第二低发射功率区域中的至少一个也被分离成多个发射功率子区域，并且低发射功率子区域被不同持续时间的时间偏移量偏移。 这些子区域可以被时间偏移预定的持续时间或随机的持续时间。

公开(公告)号：US06597922B1

公开(公告)日：2003-07-22

申请号：US09312262

申请日：1999-05-14

申请人： Fuyun Ling ,  Jack Holtzman ,  Charles E. Wheatley, III ,  Tao Chen ,  Edward G. Tiedemann ,  Gilbert Leung

发明人： Fuyun Ling ,  Jack Holtzman ,  Charles E. Wheatley, III ,  Tao Chen ,  Edward G. Tiedemann ,  Gilbert Leung

IPC分类号： H04B700

CPC分类号： H04W52/225 ,  H04W36/0094 ,  H04W52/40 ,  H04W52/42

摘要： A method and apparatus for efficient candidate frequency search while initiating a handoff in a code division multiple access communication system. The method includes when the pilot signal is transmitted by the mobile station that is power controlled to a target receive level, the traffic channel power level is increased relative to the pilot channel to improve receiver performance. An improved feature is that the received pilot received at the base station stays the same while the receiver receives extra energy in the redundant traffic symbols received to enhance the probability of correctly decoding the received frame. The base station detects the absence of the mobile station transmitted signal from the frequency of interest. If the base station is aware of the starting time and duration of the absence, it can focus its detection during this predetermined time period. The performance can be improved if the absence of the signal is spread across two frames at the frame boundary.

摘要翻译： 一种用于在码分多址通信系统中发起切换的有效候选频率​​搜索的方法和装置。 该方法包括当导频信号由被功率控制到目标接收电平的移动台发送时，业务信道功率电平相对于导频信道增加，以提高接收机性能。 改进的特征是在基站处接收到的接收到的导频保持相同，而接收机在接收到的冗余业务符号中接收到额外的能量以增强正确解码接收帧的概率。 基站从感兴趣的频率检测到不存在移动台发送的信号。 如果基站知道不存在的起始时间和持续时间，则可以在该预定时间段内集中其检测。 如果没有信号在帧边界的两个帧上扩展，则可以提高性能。

公开(公告)号：US06782277B1

公开(公告)日：2004-08-24

申请号：US09409944

申请日：1999-09-30

申请人： Tao Chen ,  Fuyun Ling ,  Jack Holtzman ,  Yu-Cheun Jou ,  Stein A. Lundby

发明人： Tao Chen ,  Fuyun Ling ,  Jack Holtzman ,  Yu-Cheun Jou ,  Stein A. Lundby

IPC分类号： H04B138

CPC分类号： H01Q3/2605 ,  H01Q1/246 ,  H04B7/0408 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/086

摘要： A method and apparatus for wireless communications wherein a base station transmits a signal to sending data to a subscriber station through a signal beam that sweeps through the coverage area of the base station. User data addressed to the subscriber station is buffered until the signal beam angle of the signal beam allows efficient transmission. The base station may alter the beam sweep speed or the shape of the beam's radiation pattern over time to maximize system efficiency and capacity.

摘要翻译： 一种用于无线通信的方法和装置，其中基站通过扫描基站的覆盖区域的信号波束发送信号以向用户站发送数据。 寻址到用户站的用户数据被缓冲，直到信号波束的信号波束角允许有效的传输。 基站可以随时间改变光束扫描速度或光束辐射图的形状，以最大化系统效率和容量。