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1. 发明申请

WO2008017032A2 ITERATIVE METHOD FOR JOINTLY ESTIMATING TIME-OF-ARRIVAL OF RECEIVED SIGNALS AND TERMINAL LOCATION 审中-公开
标题翻译：对接收到的信号和终端位置进行连续估计的迭代方法
公开(公告)号：WO2008017032A2
公开(公告)日：2008-02-07
申请号：PCT/US2007075082
申请日：2007-08-02
申请人： NTT DOCOMO INC , GUVENC ISMAIL , CHONG CHIA-CHIN
发明人： GUVENC ISMAIL , CHONG CHIA-CHIN
IPC分类号： G01S5/02 , H04W64/00
CPC分类号： G01S5/0215 , G01S5/0273 , G01S5/06 , G01S5/14 , H04W64/00
摘要： A method for mitigating NLOS effects in a localization system uses both multipath channel characteristics and information from the mobile network. The method iteratively estimates the first arriving path of the received signals and the terminal location, with the estimate of the terminal location improving the estimate of the first arriving path, and vice versa. Initially, a peak selection method determines a rough time-of-arrival (TOA) for a signal received at each of a number of different fixed terminals (FTs). An estimate of the location of the mobile unit is then provided (e.g., based on a least-squares (LS) triangulation). If the residual error is unsatisfactory, the TOAs are refined, using a search-back algorithm, which searches back from the strongest paths of the received signals. The new TOAs are used to refine the estimate of the location of the mobile terminal. In addition, the parameters of the search-back algorithm (e.g., a search-back threshold) may be modified for greater accuracy in the estimated first path. The first arriving path estimate and the location estimate are iterated until convergence (e.g., the residuals are within a tolerance) or until a termination condition is reached, usually controlled by the thresholds setting.
摘要翻译：用于减轻定位系统中的NLOS效应的方法使用来自移动网络的多径信道特征和信息。该方法迭代地估计接收信号和终端位置的第一到达路径，其中终端位置的估计改善了第一到达路径的估计，反之亦然。首先，峰值选择方法确定在多个不同固定终端（FT）中的每一个处接收到的信号的粗略到达时间（TOA）。然后提供移动单元的位置的估计（例如，基于最小二乘法（LS）三角测量）。如果剩余误差不能令人满意，则使用搜索回溯算法来改进TOA，该算法从接收到的信号的最强路径中回溯。新的TOA用于改进移动终端位置的估计。此外，可以在估计的第一路径中更精确地修改搜索返回算法的参数（例如，搜索返回阈值）。迭代第一到达路径估计和位置估计直到收敛（例如，残差在容差内）或直到达到终止条件，通常由阈值设置来控制。

2. 发明申请

WO2009091420A3 METHOD AND SYSTEM OF TIME-OF- ARRIVAL ESTIMATION FOR ULTRA WIDEBAND MULTI-BAND ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SIGNALS 审中-公开
标题翻译：超宽带多频带正交分频多路复用信号的时间估计方法与系统
公开(公告)号：WO2009091420A3
公开(公告)日：2009-12-30
申请号：PCT/US2008073133
申请日：2008-08-14
申请人： NTT DOCOMO INC , XU HUILIN , CHONG CHIA-CHIN , GUVENC ISMAIL
发明人： XU HUILIN , CHONG CHIA-CHIN , GUVENC ISMAIL
IPC分类号： H04L27/28
CPC分类号： H04L25/0212 , H04B17/336 , H04B17/364 , H04L5/0007 , H04L25/0204 , H04L25/0216 , H04L25/022 , H04L25/025 , H04L27/2601 , H04W64/00 , Y02D70/00 , Y02D70/142 , Y02D70/144
摘要： A time-of-arrival (TOA) estimation method for multi-band orthogonal frequency division multiplexing (MB-OFDM) signals uses a simple equally-spaced channel model to recover the impulse response of the wireless channel, and locates the delay of the first channel path by minimizing the energy leakage from the first channel path. The TOA is estimated based on the delay. Such a method does not require channel information for TOA estimation at the receiver and does not require modification of the receiver structure. The method also avoids a sub-optimal solution known to occur in maximum likelihood (ML) estimation.
摘要翻译：用于多频带正交频分复用（MB-OFDM）信号的到达时间（TOA）估计方法使用简单的等间隔信道模型来恢复无线信道的脉冲响应，并且定位第一通过最小化来自第一通道路径的能量泄漏的通道路径。 TOA估计是基于延迟。这种方法不需要在接收机处进行TOA估计的信道信息，并且不需要修改接收机结构。该方法还避免了已知发生在最大似然（ML）估计中的次优解。

3. 发明申请

WO2008017033A3 LINE-OF-SIGHT (LOS) OR NON-LOS (NLOS) IDENTIFICATION METHOD USING MULTIPATH CHANNEL STATISTICS 审中-公开
标题翻译：使用多通道通道统计信号的信号线（LOS）或非失效（NLOS）识别方法
公开(公告)号：WO2008017033A3
公开(公告)日：2008-12-04
申请号：PCT/US2007075084
申请日：2007-08-02
申请人： NTT DOCOMO INC , GUVENC ISMAIL , CHONG CHIA-CHIN
发明人： GUVENC ISMAIL , CHONG CHIA-CHIN
IPC分类号： G01S5/02 , H04W64/00
CPC分类号： G01S5/0215 , G01S5/14 , H04W64/00
摘要： Non-line-of-sight (NLOS) identification and mitigation are carried out in a wireless positioning system based on channel statistics derived from multipath components of a received signal. The statistics may be based on the kurtosis (210), the mean excess delay sprea (220), or the root mean square delay spread (230). The results are justified using IEEE 802.15.4a ultrawideband channel models. Amplitude and delay statistics based on the IEEE models are shown to be log-normal random variables. A joint likelihood ratio test (260) is presented for the LOS and NLOS identification.
摘要翻译：基于从接收信号的多径分量导出的信道统计，在无线定位系统中执行非视距（NLOS）识别和减轻。统计可以基于峰度（210），平均超额延迟波形（220）或均方根延迟扩展（230）。结果证明了使用IEEE 802.15.4a超宽带信道模型。基于IEEE模型的幅度和延迟统计显示为对数正态随机变量。针对LOS和NLOS识别提出了联合似然比检验（260）。

4. 发明申请

WO2008017034A3 WEIGHTED LEAST SQUARE LOCALIZATION METHOD EXPLOITING MULTIPATH CHANNEL STATISTICS FOR NON-LINE-OF-SIGHT MITIGATION 审中-公开
标题翻译：加权最小二乘定位方法为非线性降低开拓多路径信道统计量
公开(公告)号：WO2008017034A3
公开(公告)日：2008-12-04
申请号：PCT/US2007075087
申请日：2007-08-02
申请人： NTT DOCOMO INC , GUVENC ISMAIL , CHONG CHIA-CHIN
发明人： GUVENC ISMAIL , CHONG CHIA-CHIN
IPC分类号： G01S5/02 , G01S5/14 , H04W64/00
CPC分类号： G01S5/14 , G01S5/0215 , G01S5/0273 , G01S5/0278 , H04W64/00
摘要： A method mitigates NLOS conditions based on weighted least squares (WLS) technique, in which the weights are derived from multipath components (MPCs) of the received signals. The weighting methodology can be used with both linear and non-linear least squares models, as well as different other NLOS mitigation schemes, such as residual based algorithms or maximum likelihood techniques.
摘要翻译：一种方法基于加权最小平方（WLS）技术来减轻NLOS条件，其中权重是从接收信号的多路径分量（MPC）导出的。加权方法可以用于线性和非线性最小二乘模型，以及不同的其他NLOS抑制方案，如基于残差的算法或最大似然技术。

5. 发明申请

WO2009058742A3 SYNCHRONIZED MULTI-LINK TRANSMISSION IN AN ARQ-ENABLED MULTI-HOP WIRELESS NETWORK 审中-公开
标题翻译：在ARQ启用的多人无线网络中同步多链路传输
公开(公告)号：WO2009058742A3
公开(公告)日：2009-07-30
申请号：PCT/US2008081369
申请日：2008-10-27
申请人： NTT DOCOMO INC , JEONG MOO RYONG , GUVENC ISMAIL , WATANABE FUJIO
发明人： JEONG MOO RYONG , GUVENC ISMAIL , WATANABE FUJIO
IPC分类号： H04L1/18 , H04W84/18
CPC分类号： H04B7/2606 , H04L1/1877 , H04L1/1887 , H04L2001/0097 , H04W56/0005 , H04W84/20
摘要： A method and apparatus is disclosed herein for synchronized multi-link transmission in an ARQ-enabled multi-hop wireless network. In one embodiment, the method comprises performing pre-transmission of a packet to hops to enable a base station and the plurality of hops in the network to transmit the packet synchronously to one or more mobile stations in the wireless communication system; and performing one or more re-transmissions of the packet at a set of one or more hops forming a path in the network if time remaining before a synchronized transmission time for the path as a whole is greater than a threshold.
摘要翻译：本文公开了一种在启用ARQ的多跳无线网络中进行同步多链路传输的方法和装置。在一个实施例中，所述方法包括执行分组的预传输以使基站能够和所述网络中的所述多个跳跃同步地传送到所述无线通信系统中的一个或多个移动台; 以及如果在整个路径的同步传输时间之前剩余的时间大于阈值，则在一个或多个跳跃的组中执行一个或多个组播路径的重传。

6. 发明申请

WO2013055430A3 A METHOD FOR HANDOVER PERFORMANCE IMPROVEMENT IN HETEROGENEOUS WIRELESS NETWORKS 审中-公开
标题翻译：异构无线网络中切换性能改进的方法
公开(公告)号：WO2013055430A3
公开(公告)日：2014-05-08
申请号：PCT/US2012048690
申请日：2012-07-27
申请人： NTT DOCOMO INC , GUVENC ISMAIL , LOPEZ-PEREZ DAVID
发明人： GUVENC ISMAIL , LOPEZ-PEREZ DAVID
IPC分类号： H04B7/26
CPC分类号： H04W36/0083 , H04W84/045 , Y02D70/00 , Y02D70/1262 , Y02D70/24
摘要： A heterogeneous network is disclosed having macrocells and picocells with co-channel operation for both low-mobility and high-mobility users. The co-channel operation occurs over both coordinated and uncoordinated resources. During normal operation without any handover conditions, the high-mobility user communicates with a macrocell base station in both the coordinated and uncoordinated resources. But if a handover condition to a low-power node (a picocell) arises, the high-mobility user is rescheduled to communicate only in the coordinated resources without allowing a picocell handover despite the handover condition to prevent handover failures (HFs) and to minimize ping-pongs. On the other hand, low-mobility users are allowed to make handover to picocells.
摘要翻译：公开了具有用于低移动性和高移动性用户的同信道操作的宏小区和微微小区的异构网络。共同渠道运作发生在协调和不协调的资源。在没有任何切换条件的正常操作期间，高移动性用户在协调和不协调的资源中与宏小区基站进行通信。但是，如果发生到低功率节点（微微小区）的切换条件，则高移动性用户重新调度以仅在协调的资源中进行通信，而不允许微微小区切换，而不管切换状况如何以防止切换故障（HF）并且最小化平pongs。另一方面，低移动性用户被允许切换到微微小区。

7. 发明申请

WO2009042472A3 A METHOD FOR ARQ-ENABLED PRE-TRANSMISSIONS IN MULTICAST AND BROADCAST SERVICES OF RELAY NETWORKS UTILIZING THE IDLE PERIODS 审中-公开
标题翻译：使用空闲周期的继电网的多媒体和广播服务中的ARQ启用的预传输方法
公开(公告)号：WO2009042472A3
公开(公告)日：2009-05-14
申请号：PCT/US2008076693
申请日：2008-09-17
申请人： NTT DOCOMO INC , GUVENC ISMAIL , JEONG MOO RYONG , WATANABE FUJIO
发明人： GUVENC ISMAIL , JEONG MOO RYONG , WATANABE FUJIO
IPC分类号： H04L1/18 , H04B7/14
CPC分类号： H04L1/02 , H04B7/155 , H04L1/1803 , H04L1/1848 , H04L2001/0093 , H04L2001/0097 , H04W56/00
摘要： A method and apparatus is disclosed herein for transmitting data in a network (e.g., a relay network). In one embodiment, the method comprises performing pre-transmission of a packet to hops to enable the base station and the plurality of hops to transmit the packet synchronously to one or more mobile stations in the wireless communication system; and performing one or more re-transmissions of the packet at a first set of one or more hops in the system during a delay due to pre-transmissions at a second set of one or more hops in the system.
摘要翻译：本文公开的用于在网络（例如，中继网络）中传输数据的方法和装置。在一个实施例中，所述方法包括执行分组的预发送以使所述基站和所述多个跳跃能够同步地发送所述分组到所述无线通信系统中的一个或多个移动台; 以及由于在系统中的一个或多个跳的第二组处的预发送而在延迟期间在系统中的一个或多个跳的第一组处执行所述分组的一个或多个重新发送。

8. 发明申请

WO2009111392A3 OFDMA-BASED CO-CHANNEL FEMTOCELL 审中-公开
标题翻译：基于OFDMA的同信道FEMTOCELL
公开(公告)号：WO2009111392A3
公开(公告)日：2009-12-30
申请号：PCT/US2009035716
申请日：2009-03-02
申请人： NTT DOCOMO INC , SAHIN MUSTAFA EMIN , ARSLAN HUSEYIN , GUVENC ISMAIL , JEONG MOO RYONG
发明人： SAHIN MUSTAFA EMIN , ARSLAN HUSEYIN , GUVENC ISMAIL , JEONG MOO RYONG
IPC分类号： H04B7/208
CPC分类号： H04W72/082 , H04L5/0007 , H04L5/0033 , H04L5/0037 , H04L5/0044 , H04L5/0062 , H04L5/0092 , H04W16/32 , H04W72/0426 , H04W84/045
摘要： A femtocell increases efficiency and coverage of a macrocellular network operating in a co-channel manner within the macrocell spectrum by selecting subcarriers for its mobile station using both the subcarrier allocation map received from the macrocell and a spectrum sensing operation. Interference is avoided by selecting only subcarriers not allocated by the macrocell and subcarriers allocated to users not nearby to the femtocell. Interference is eliminated from the received signals using co-channel interference avoidance techniques. Selection of subcarriers for femtocell use may take into consideration inter-carrier interference detected.
摘要翻译：毫微微小区通过使用从宏小区接收的子载波分配图和频谱感测操作两者来为其移动台选择子载波，从而提高在宏小区频谱内以同信道方式操作的宏蜂窝网络的效率和覆盖范围。通过仅选择未被宏小区分配的子载波和分配给不在毫微微小区附近的用户的子载波来避免干扰。使用同信道干扰避免技术从接收信号中消除干扰。选择用于毫微微小区使用的子载波可考虑检测到的载波间干扰。

9. 发明申请

WO2008124535A2 UPLINK MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) AND COOPERATIVE MIMO TRANSMISSIONS 审中-公开
标题翻译：上行多输入多输出（MIMO）和合作MIMO传输
公开(公告)号：WO2008124535A2
公开(公告)日：2008-10-16
申请号：PCT/US2008059307
申请日：2008-04-03
申请人： NTT DOCOMO INC , LI ANXIN , LI XIANGMING , KAYAMA HIDETOSHI , GUVENC ISMAIL , JEONG MOO RYONG
发明人： LI ANXIN , LI XIANGMING , KAYAMA HIDETOSHI , GUVENC ISMAIL , JEONG MOO RYONG
IPC分类号： H04W28/18 , H04W76/02
CPC分类号： H04B7/0413 , H04B7/024 , H04B7/026 , H04B7/0404 , H04B7/0456 , H04B7/0602 , H04B7/0669 , H04B7/0678 , H04B7/0689 , H04B7/0691 , H04B7/0697 , H04L5/0023 , H04L5/0037 , H04L5/0044 , H04L5/0048 , H04L25/0206 , H04L2025/03426 , H04W8/24 , H04W72/0406
摘要： A method is provided for MIMO uplink communications between a base station and a wireless station with more than two antennae. The method includes: (a) negotiating between the base station and the wireless station uplink MIMO/cooperative MIMO capabilities, using a message exchange protocol in which a message exchanged comprises a field for specifying uplink MIMO/cooperative MIMO capabilities; (b) the base station receiving a request from the wireless station for data transmission; (c) the base station sending the wireless station an allocated resource and an uplink MIMO/cooperative MIMO method for uplink transmission; (e) the wireless station mapping data symbols to the allocated resource with proper pilot pattern; and (f) the base station detecting the data symbols from the channel.
摘要翻译：提供了一种用于具有两个以上天线的基站与无线站之间的MIMO上行链路通信的方法。该方法包括：（a）使用消息交换协议在基站和无线站上行MIMO /协作MIMO能力之间进行协商，其中交换的消息包括用于指定上行MIMO /协作MIMO能力的字段; （b）基站接收来自无线站的数据传输请求; （c）基站向无线站发送分配的资源和用于上行链路传输的上行MIMO /协作MIMO方法; （e）无线站将数据符号以适当的导频模式映射到所分配的资源; 和（f）基站从信道检测数据符号。

10. 发明申请

WO2008066815A3 A METHOD AND APPARATUS FOR RELIABLE MULTICASTING IN WIRELESS RELAY NETWORKS 审中-公开
标题翻译：无线中继网络中可靠多播的方法和装置
公开(公告)号：WO2008066815A3
公开(公告)日：2008-07-24
申请号：PCT/US2007024455
申请日：2007-11-27
申请人： NTT DOCOMO INC , KOZAT ULAS C , GUVENC ISMAIL
发明人： KOZAT ULAS C , GUVENC ISMAIL
IPC分类号： H04L1/16
CPC分类号： H04L1/1685 , H04L1/1887 , H04L2001/0093
摘要： A method and apparatus is disclosed herein for performing multi casting. In one embodiment, the method comprises receiving routing, association, relaying, and/or topology information associated with a plurality of nodes in a multi-hop wireless network, the plurality of nodes communicably coupled in a tree or mesh arrangement via a plurality of broadcast channels; and determining a subset of the plurality of nodes over each broadcast channel on the multi-hop wireless network that is responsible for sending acknowledgment information, in response to receipt or lack of receipt of transmissions, back to senders of transmissions.
摘要翻译：本文公开了用于执行多投射的方法和装置。在一个实施例中，该方法包括接收与多跳无线网络中的多个节点相关联的路由，关联，中继和/或拓扑信息，所述多个节点经由多个广播渠道; 以及响应于接收到或不接收到传输，确定负责发送确认信息的多跳无线网络上的每个广播信道上的多个节点的子集，回到传输的发送者。

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