公开(公告)号：US07907907B2

公开(公告)日：2011-03-15

申请号：US11494396

申请日：2006-07-27

申请人： Xiaoxin Qiu

发明人： Xiaoxin Qiu

IPC分类号： H04B17/00

CPC分类号： H04W74/006 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0079 ,  H04L1/0091 ,  H04L25/03318 ,  H04L27/0012 ,  H04W28/18 ,  H04W74/0833 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1226 ,  Y02D70/23

摘要： RF communications received by a wireless terminal from a servicing base station are used to determine the downlink quality report and implement link adaptation decisions. This involves first implementing an initial transmission scheme between the servicing base station and the wireless terminal. Next, a current downlink quality report corresponding to the initial transmission scheme is generated by the wireless terminal and received at the servicing base station. This downlink quality report is based in whole or in part on a bit-error probability (BEP). The current downlink quality report that corresponds to the initial transmission scheme is then compared to link adaptation thresholds. When the current downlink quality report compares unfavorably to the link adaptation thresholds, an alternative transmission scheme is selected and implemented between the servicing base station and the wireless terminals if the alternative transmission scheme is expected to result in an improved downlink quality report over the current down-link quality report.

摘要翻译： 使用无线终端从服务基站接收的RF通信来确定下行链路质量报告并实现链路适配决定。 这涉及首先在服务基站和无线终端之间实现初始传输方案。 接下来，由无线终端产生与初始传输方案对应的当前下行链路质量报告，并在服务基站接收。 该下行链路质量报告全部或部分基于比特误差概率（BEP）。 然后将对应于初始传输方案的当前下行链路质量报告与链路适配阈值进行比较。 当当前的下行链路质量报告与链路自适应阈值不利地比较时，如果期望替代传输方案导致当前向下的改进的下行链路质量报告，则在服务基站和无线终端之间选择并实现替代传输方案 链接质量报告。

公开(公告)号：US20090103598A1

公开(公告)日：2009-04-23

申请号：US12315993

申请日：2008-12-09

申请人： Justin Che-I Chuang ,  Xiaoxin Qiu

发明人： Justin Che-I Chuang ,  Xiaoxin Qiu

IPC分类号： H04B17/00

CPC分类号： H04L1/0009 ,  H04L1/0003 ,  H04L1/0021

摘要： The present invention implements a method and system for dynamically adapting the modulation and coding scheme for radio links in a wireless communications network based on a retransmission environment model in order to maximize throughput and most efficiently allocate bandwidth resources. The present invention encompasses a refined calculus and methodology for deriving the link adaptation thresholds in a retransmission environment using a complex model and analysis of the retransmission environment. The present invention holds particular application for wireless data communications as opposed to real time data services because it is based on a retransmission model applicable primarily for data services. A critical component of this new link adaptation system is a “no transmission” cutoff mode that is selected for SIR below a base threshold value. This new mode prevents system instability and misallocation of bandwidth in a wireless communication system.

摘要翻译： 本发明实现了一种方法和系统，用于基于重传环境模型动态地适应无线通信网络中的无线电链路的调制和编码方案，以便最大化吞吐量并且最有效地分配带宽资源。 本发明涉及一种用于使用复杂模型和重传环境的分析在重传环境中导出链路自适应阈值的精细微积分和方法。 本发明与实时数据业务相比，具有无线数据通信的特殊应用，因为它基于主要适用于数据业务的重传模型。 该新的链路自适应系统的关键部件是针对低于基本阈值的SIR选择的“无传输”截止模式。 这种新模式可防止无线通信系统中的系统不稳定和带宽分配不均匀。

公开(公告)号：US07463677B2

公开(公告)日：2008-12-09

申请号：US10970883

申请日：2004-10-22

申请人： Justin Che-I Chuang ,  Xiaoxin Qiu

发明人： Justin Che-I Chuang ,  Xiaoxin Qiu

IPC分类号： H04B17/00

CPC分类号： H04L1/0009 ,  H04L1/0003 ,  H04L1/0021

摘要： The present invention implements a method and system for dynamically adapting the modulation and coding scheme for radio links in a wireless communications network based on a retransmission environment model in order to maximize throughput and most efficiently allocate bandwidth resources. The present invention encompasses a refined calculus and methodology for deriving the link adaptation thresholds in a retransmission environment using a complex model and analysis of the retransmission environment. The present invention holds particular application for wireless data communications as opposed to real time data services because it is based on a retransmission model applicable primarily for data services. A critical component of this new link adaptation system is a “no transmission” cutoff mode that is selected for SIR below a base threshold value. This new mode prevents system instability and misallocation of bandwidth in a wireless communication system.

摘要翻译： 本发明实现了一种方法和系统，用于基于重传环境模型动态地适应无线通信网络中的无线电链路的调制和编码方案，以便最大化吞吐量并且最有效地分配带宽资源。 本发明涉及一种用于使用复杂模型和重传环境的分析在重传环境中导出链路自适应阈值的精细微积分和方法。 本发明与实时数据业务相比，具有无线数据通信的特殊应用，因为它基于主要适用于数据业务的重传模型。 该新的链路自适应系统的关键部件是针对低于基本阈值的SIR选择的“无传输”截止模式。 这种新模式可防止无线通信系统中的系统不稳定和带宽分配不均匀。

公开(公告)号：US20070155334A1

公开(公告)日：2007-07-05

申请号：US11714982

申请日：2007-03-07

申请人： Li Chang ,  Yongqian Wang ,  Xiaoxin Qiu ,  Nelson Sollenberger

发明人： Li Chang ,  Yongqian Wang ,  Xiaoxin Qiu ,  Nelson Sollenberger

IPC分类号： H04B17/00

CPC分类号： H04L27/0012 ,  H04B17/327 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0045 ,  H04L1/0075 ,  H04L1/203 ,  H04L25/03261 ,  H04L25/03318

摘要： RF communications received by a wireless terminal from a servicing base station are used to determine the channel quality such as reported bit error probability (BEP). The RF communications may be in the form of RF bursts that are part of a data frame. An estimated BEP may be determined from the signal to noise ratio (SNR) of the RF bursts and or a sequence of soft decisions extracted from the RF bursts, and their historical performance. The SNR maps to an estimated BEP based upon the modulation format of the RF bursts. The soft decisions decode to produce a data block. When the soft decisions decoded favorably, the re-encoded data block produces a sequence of re-encoded decisions. Comparing the re-encoded decisions to the soft decisions yields a re-encoded bit error (RBER). The reported BEP may be based upon the estimated BEP, RBER, and/or RBER threshold. The RBER threshold may be adaptively incremented or decremented depending upon whether or not the RF communications were properly decoded. The size of the increment or decrement may be based on the channel quality.

摘要翻译： 使用无线终端从服务基站接收的RF通信来确定诸如所报告的比特错误概率（BEP）的信道质量。 RF通信可以是作为数据帧的一部分的RF突发的形式。 可以根据RF突发的信噪比（SNR）和从RF突发提取的一系列软判决及其历史性能来确定估计的BEP。 SNR基于RF突发的调制格式映射到估计的BEP。 软判决解码以产生数据块。 当软判决被有利地解码时，重新编码的数据块产生一系列重新编码的决定。 将重新编码的决定与软判决进行比较产生重编码位错误（RBER）。 报告的BEP可以基于估计的BEP，RBER和/或RBER阈值。 RBER阈值可以根据RF通信是否被正确解码而自适应地递增或递减。 增量或减量的大小可以基于通道质量。

公开(公告)号：US06459901B1

公开(公告)日：2002-10-01

申请号：US09453566

申请日：1999-12-03

申请人： Kapil K. Chawla ,  Justin Che-I Chuang ,  Xiaoxin Qiu ,  Nelson Ray Sollenberger

发明人： Kapil K. Chawla ,  Justin Che-I Chuang ,  Xiaoxin Qiu ,  Nelson Ray Sollenberger

IPC分类号： H04Q720

CPC分类号： H04W72/04 ,  H04W16/14 ,  H04W24/00 ,  H04W28/18 ,  H04W72/085 ,  H04W92/20

摘要： This invention provides wireless resource allocation techniques where the wireless network resource allocation is based on maximum system gain. System gain may be the difference between a maximum performance (e.g., throughput rate) for a requested link and a performance loss of all currently active links affected by the requested link. A currently active link is affected if the requested link is within its link neighborhood. Wireless network resources are allocated to optimize system performance. Inter-base communication may be used to facilitate information exchange among base stations to optimize system performance. The performance loss experienced by any currently active link is called damage to that link. Damage may be determined in a pair-wise fashion based on a nominal performance which may be defined as the performance of a link if interference is experienced only from links which are outside the link neighborhood of the link or as a system parameter. The damage is the difference between the nominal performance and the performance for the link if experiencing interference only from the requested link. Determining damage is computationally efficient because it only requires consideration of the nominal performance and the performance of the requested link. Link neighborhoods limit inter-base station communications and reduces base station interconnect costs.

摘要翻译： 本发明提供无线资源分配技术，其中无线网络资源分配基于最大系统增益。 系统增益可以是所请求的链路的最大性能（例如，吞吐率）与受所请求的链路影响的所有当前活动链路的性能损失之间的差异。 如果所请求的链接在其链接邻域内，则当前活动的链接将受到影响。 分配无线网络资源以优化系统性能。 基站间通信可用于促进基站之间的信息交换，以优化系统性能。 任何当前活动链接遭遇的性能损失都称为对该链路的损坏。 可以基于标称性能来确定损害，该标称性能可以被定义为如果干扰仅仅是来自在链路的链路附近的链路或作为系统参数的链路经历的链路的性能。 如果仅通过请求的链路仅受到干扰，则损坏是标称性能与链路性能之间的差异。 确定损害在计算上是有效的，因为它只需要考虑所要求链路的标称性能和性能。 链路邻域限制基站间通信，降低基站互连成本。

公开(公告)号：US06243371B1

公开(公告)日：2001-06-05

申请号：US08991571

申请日：1997-12-16

申请人： Kapil K. Chawla ,  Xiaoxin Qiu

发明人： Kapil K. Chawla ,  Xiaoxin Qiu

IPC分类号： H04B7212

CPC分类号： H04B17/20 ,  H04W16/10 ,  H04W16/24 ,  H04W84/14

摘要： A method and apparatus for managing interference in a wireless communications system. Each base generates a predictable beam-off sequence, and terminals measure the received signal over time. This received signal is then used to estimate or measure performance to schedule transmissions to the terminal.

摘要翻译： 一种用于管理无线通信系统中的干扰的方法和装置。 每个基地产生可预测的波束截止序列，并且终端随时间测量接收的信号。 然后，该接收的信号用于估计或测量性能以调度对终端的传输。

公开(公告)号：US6137787A

公开(公告)日：2000-10-24

申请号：US832546

申请日：1997-04-03

申请人： Kapil K. Chawla ,  Xiaoxin Qiu

发明人： Kapil K. Chawla ,  Xiaoxin Qiu

IPC分类号： H04B7/26 ,  H04L12/56 ,  H04W16/02 ,  H04W16/12 ,  H04W72/04 ,  H04W74/02 ,  H04B7/212 ,  H04J3/00

CPC分类号： H04W16/12 ,  H04W16/02 ,  H04B7/2656 ,  H04W72/0446 ,  H04W72/048 ,  H04W72/085 ,  H04W74/02

摘要： A method and apparatus for assigning communication resources for at least one communication site in a time division communication system having multiple reuse patterns in the time domain. A first plurality of communication sites communicate using a first portion of a time frame corresponding to a first reuse pattern. A second plurality of communication sites communicate using a second portion of said time frame corresponding to a second reuse pattern.

摘要翻译： 一种用于在具有时域中的多个重用模式的时分通信系统中为至少一个通信站点分配通信资源的方法和装置。 第一多个通信站点使用与第一重用模式对应的时间帧的第一部分进行通信。 第二多个通信站点使用对应于第二重用模式的所述时间帧的第二部分进行通信。