公开(公告)号：US06493331B1

公开(公告)日：2002-12-10

申请号：US09539157

申请日：2000-03-30

申请人： Jay R. Walton ,  Mark Wallace ,  Jack Holtzman ,  Franklin P. Antonio

发明人： Jay R. Walton ,  Mark Wallace ,  Jack Holtzman ,  Franklin P. Antonio

IPC分类号： H04Q728

CPC分类号： H04W52/343 ,  H04B17/336 ,  H04B17/382 ,  H04W52/24 ,  H04W52/241 ,  H04W52/244 ,  H04W52/267 ,  H04W52/286 ,  H04W52/346 ,  H04W72/1231 ,  H04W72/1242 ,  H04W72/1252

摘要： In some aspects, each cell in the communications system can be designed to operate in accordance with a set of back-off factors that identify the reductions in peak transmit power levels for the channels associated with the back-off factors. The back-off factors are defined to provide the required power to a large percentage of the users while reducing the amount of interference. In some other aspects, the cells operate using an adaptive reuse scheme that allows the cells to efficiently allocate and reallocate the system resources to reflect changes in the system. A reuse scheme is initially defined and resources are allocated to the cells. During operation, changes in the operating conditions of the system are detected and the reuse scheme is redefined as necessary based on the detected changes. For example, the loading conditions of the cells can be detected, and the resources can be reallocated and/or the reuse scheme can be redefined. In yet other aspects, techniques are provided to efficiency schedule data transmissions and to assign channels to users. Data transmissions can be scheduled based on user priorities, some fairness criteria, system requirements, and other factors. Users are assigned to available channels based on a number of channel assignment schemes. Channel metrics are also provided, which can be used to prioritize users and for channel assignments.

摘要翻译： 在一些方面，通信系统中的每个小区可以被设计为根据一组回退因子进行操作，所述回退因子识别与所述回退因素相关联的信道的峰值发射功率水平的降低。 限制因素被定义为为大量用户提供所需的功率，同时减少干扰量。 在一些其他方面，小区使用允许小区有效地分配和重新分配系统资源以反映系统中的变化的自适应重用方案来操作。 最初定义了重用方案，并将资源分配给小区。 在操作期间，检测到系统的操作条件的变化，并且根据检测到的改变根据需要重新定义重新使用方案。 例如，可以检测小区的负载条件，并且可以重新分配资源和/或重新定义重用方案。 在另外的方面，提供了技术来提高调度数据传输并向用户分配信道。 数据传输可以根据用户优先级，一些公平标准，系统要求和其他因素进行调度。 基于多个信道分配方案将用户分配给可用信道。 还提供频道指标，可用于对用户和频道分配进行优先级排序。

公开(公告)号：US06996127B2

公开(公告)日：2006-02-07

申请号：US10447330

申请日：2003-05-28

申请人： Ramin Rezaiifar ,  Jack Holtzman

发明人： Ramin Rezaiifar ,  Jack Holtzman

IPC分类号： H04J3/16 ,  H04J3/26 ,  H04L12/28 ,  H04B7/185 ,  H04B17/02

CPC分类号： H04W52/265 ,  H04W28/18 ,  H04W52/24 ,  H04W52/267 ,  H04W52/343 ,  H04W52/346

摘要： A method, and corresponding apparatus, applies to individual base stations in a wireless communications systems, where each base station performs rate assignment to mobile stations optimally, but independently of the other base stations. Different base stations affect each other through other cell interference, and continuously modify their reversed link rate assignment based on the other-cell interference received and the requested rates from the mobile stations. The base stations converge to a stable condition with uncoordinated optimizations. The optimizing technique maximizes total through put in each cell (maximizing rates) while maintaining interference to other cells at a minimum level, and being subject to at least some of the following constraints: mobile station's maximum transmit power, mobile station's requested rate, discrete set of possible rates, maximum rise-over-thermal interference at the base station, and minimum required received error per bit normalized for noise.

公开(公告)号：US20050124369A1

公开(公告)日：2005-06-09

申请号：US10728035

申请日：2003-12-03

申请人： Rashid Attar ,  Bibhu Mohanty ,  Jack Holtzman ,  Jelena Damnjanovic

发明人： Rashid Attar ,  Bibhu Mohanty ,  Jack Holtzman ,  Jelena Damnjanovic

IPC分类号： H04W24/00 ,  H04W24/04 ,  H04W24/08 ,  H04Q7/20

CPC分类号： H04W24/08 ,  H04W28/02 ,  H04W88/08

摘要： A method and apparatus for overload detection and control is disclosed. A base station may be in communication with one or more subscriber stations. Overload may be detected as a function of a plurality of parameters, each of which places a load on the base station. Both the type and degree of overload may be ascertained. Appropriate remedial measures may be implemented that are suitable to the type and degree of overload detected.

摘要翻译： 公开了一种用于过载检测和控制的方法和装置。 基站可以与一个或多个用户站进行通信。 可以根据多个参数检测过载，每个参数在基站上施加负载。 可以确定过载的类型和程度。 可以采取适当的补救措施，适用于检测到的过载类型和程度。

公开(公告)号：US07072321B2

公开(公告)日：2006-07-04

申请号：US10972198

申请日：2004-10-22

申请人： Jack Holtzman ,  Gang Bao

发明人： Jack Holtzman ,  Gang Bao

IPC分类号： H04B7/216

CPC分类号： H04W72/1226 ,  H04L1/0002 ,  H04L1/0015 ,  H04L1/0046 ,  H04W52/16 ,  H04W52/223 ,  H04W52/26 ,  H04W52/50 ,  H04W72/1242

摘要： A method and apparatus for selecting a favored transmission slot for communicating non-voice data in conjunction with a voice-data communication. The slot, reflecting a favored power level and transmission rate for transmitting the non-voice data on a supplemental channel, is selected based upon the transmission power levels for voice-data transmitted by a base station to a remote station on a fundamental channel. The favored transmission slot is selected without the remote station messaging information to the base station concerning frequency channel or interference information for the supplemental channel. A method of performing forward-link scheduling in a wireless communication system includes determining the available base station power at the beginning of a frame, predicting the required transmit power at the beginning of the frame for each supplemental channel, determining rates sustainable with the predicted transmit power, dividing by throughput over a recent window to obtain a supplemental channel priority index, and allowing the supplemental channel with the highest priority index to transmit over the next frame.

摘要翻译： 一种用于选择有利的传输时隙的方法和装置，用于结合语音数据通信来传送非语音数据。 基于在基本信道上由基站发送到远程站的语音数据的发送功率电平来选择反映用于在辅助信道上发送非语音数据的有利功率电平和传输速率的时隙。 选择有利的传输时隙，而无需向基站发送关于用于补充信道的频率信道或干扰信息的远程站消息传递信息。 在无线通信系统中执行前向链路调度的方法包括：确定帧开始处的可用基站功率，在每个补充信道的帧开始处预测所需的发射功率，确定具有预测的传输可持续的速率 功率除以最近窗口的吞吐量以获得补充信道优先级索引，并允许具有最高优先级索引的补充信道在下一帧上进行传输。

公开(公告)号：US20050190718A1

公开(公告)日：2005-09-01

申请号：US10961652

申请日：2004-10-08

申请人： Jack Holtzman ,  Sandip Sarkar ,  Ahmed Saifuddin

发明人： Jack Holtzman ,  Sandip Sarkar ,  Ahmed Saifuddin

IPC分类号： H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04W52/22 ,  H04W52/28 ,  H04W52/48 ,  H04Q7/20 ,  H04J3/24

CPC分类号： H04L1/1819 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/1825 ,  H04L1/1845 ,  H04L1/1887 ,  H04W52/282

摘要： Methods and apparatus are presented for scheduling data packet transmissions during optimal channel conditions. In one method, data packet retransmissions are scheduled for transmission during favorable channel conditions when the target remote station is moving slowly, but are scheduled for periodic transmissions when the target is moving moderately or fast. In another method, long delays for retransmissions in a channel sensitive timing scheme are eliminated. In other methods, a combination of periodic and aperiodic retransmissions are used to achieve the desired frame error rate.

摘要翻译： 呈现用于在最佳信道条件下调度数据分组传输的方法和装置。 在一种方法中，当目标远程站缓慢移动时，在有利的信道条件期间调度数据分组重传，以便当目标移动适度或快速时被调度用于周期性传输。 在另一种方法中，消除了在信道敏感定时方案中重传的长时间延迟。 在其他方法中，使用周期性和非周期性重传的组合来实现期望的帧错误率。

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：US06745044B1

公开(公告)日：2004-06-01

申请号：US09675706

申请日：2000-09-29

申请人： Jack Holtzman ,  Gang Bao

发明人： Jack Holtzman ,  Gang Bao

IPC分类号： H04B106

CPC分类号： H04W52/343 ,  H04W52/223 ,  H04W52/346

摘要： Techniques to (more accurately) estimate the transmit power available for data service in a future time period (e.g., the next frame). In accordance with one aspect, variation in the available transmit power over time is estimated. A first margin is then computed and used to account for the estimated variation in the available transmit power. The available transmit power at a future time instance (e.g., the beginning of the next frame) is predicted and reduced by the first margin to derive a more accurate estimate of the available transmit power for the next frame. In accordance with another aspect, variation in the required transmit power for a particular data user is estimated and used in scheduling data transmission to this data user. A second margin can be computed and used to account for the estimated variation in the required transmit power for the data user. Whereas the first margin accounts for variation in the (overall) available transmit power, the second margin is specific to the particular link conditions experienced by the data user.

摘要翻译： 在更后期（例如下一帧）中（更准确地）估计可用于数据业务的发射功率的技术。 根据一个方面，估计可用发射功率随时间的变化。 然后计算第一余量并用于考虑可用发射功率的估计变化。 在将来的时间实例（例如，下一帧的开始）的可用发射功率被预测和减小第一余量以导出对于下一帧的可用发射功率的更准确的估计。 根据另一方面，估计特定数据用户的所需传输功率的变化并用于向该数据用户调度数据传输。 可以计算第二余量并用于考虑数据用户所需传输功率的估计变化。 而第一保证金考虑到（总体）可用发射功率的变化，第二保证金是特定于数据用户经历的特定链路条件。

公开(公告)号：US06850506B1

公开(公告)日：2005-02-01

申请号：US09528235

申请日：2000-03-17

申请人： Jack Holtzman ,  Gang Bao

发明人： Jack Holtzman ,  Gang Bao

IPC分类号： H04J13/00 ,  H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04L12/28 ,  H04W52/16 ,  H04W52/22 ,  H04W52/26 ,  H04W52/50 ,  H04W72/12 ,  H04B7/216

CPC分类号： H04W72/1226 ,  H04L1/0002 ,  H04L1/0015 ,  H04L1/0046 ,  H04W52/16 ,  H04W52/223 ,  H04W52/26 ,  H04W52/50 ,  H04W72/1242

摘要： A method and apparatus for selecting a favored transmission slot for communicating non-voice data in conjunction with a voice-data communication. The slot, reflecting a favored power level and transmission rate for transmitting the non-voice data on a supplemental channel, is selected based upon the transmission power levels for voice-data transmitted by a base station to a remote station on a fundamental channel. The favored transmission slot is selected without the remote station messaging information to the base station concerning frequency channel or interference information for the supplemental channel. A method of performing forward-link scheduling in a wireless communication system includes determining the available base station power at the beginning of a frame, predicting the required transmit power at the beginning of the frame for each supplemental channel, determining rates sustainable with the predicted transmit power, dividing by throughput over a recent window to obtain a supplemental channel priority index, and allowing the supplemental channel with the highest priority index to transmit over the next frame.

摘要翻译： 一种用于选择有利的传输时隙的方法和装置，用于结合语音数据通信来传送非语音数据。 基于在基本信道上由基站发送到远程站的语音数据的发送功率电平来选择反映用于在辅助信道上发送非语音数据的有利功率电平和传输速率的时隙。 选择有利的传输时隙，而无需向基站发送关于用于补充信道的频率信道或干扰信息的远程站消息传递信息。 在无线通信系统中执行前向链路调度的方法包括：确定帧开始处的可用基站功率，在每个补充信道的帧开始处预测所需的发射功率，确定具有预测的传输可持续的速率 功率除以最近窗口的吞吐量以获得补充信道优先级索引，并允许具有最高优先级索引的补充信道在下一帧上进行传输。

公开(公告)号：US06404760B1

公开(公告)日：2002-06-11

申请号：US09356610

申请日：1999-07-19

申请人： Jack Holtzman ,  Dilip G. Warrier

发明人： Jack Holtzman ,  Dilip G. Warrier

IPC分类号： H04J1100

CPC分类号： H04B1/7107 ,  H04B1/71072 ,  H04B2001/71077 ,  H04B2201/70701

摘要： Several methods and corresponding apparatus to reduce multiple access interference in code division multiple access communications systems through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate. This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.

摘要翻译： 通过连续的干扰消除技术，减少码分多址通信系统中的多址干扰的几种方法和相应装置。 通过对与最强信号相关联的导频信号的分析形成对最强干扰信号的抵消的可靠性的估计。 该估计用于导出乘以最强信号的副本以提供加权副本的权重。 从所接收的信道的延迟版本中减去加权副本。 因此，当最强的信号复制品最有可能是准确的并且当最强的信号复制品不太可能是准确的时，不能很强的实现干扰消除。 这避免了当副本更有可能产生额外的干扰而不是减少时，将最强信号的副本与接收的信道组合。

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。