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1. 发明申请

WO2009042472A2 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：一种利用空闲期的中继网络的组播和广播业务中的ARQ使能的前发送的方法
公开(公告)号：WO2009042472A2
公开(公告)日：2009-04-02
申请号：PCT/US2008/076693
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： H04W4/00
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：这里公开了一种用于在网络（例如，中继网络）中传输数据的方法和装置。在一个实施例中，该方法包括执行分组的预先传输以跳跃以使基站和多个跳跃同步地向无线通信系统中的一个或多个移动台传输分组; 以及在由于系统中第二组一个或多个中继段处的预传输而导致的延迟期间，在系统中的第一组一个或多个中继段处执行分组的一次或多次重传。

2. 发明申请

WO2009142954A1 FEMTOCELL CHANNEL ASSIGNMENT AND POWER CONTROL FOR IMPROVED FEMTOCELL COVERAGE AND EFFICIENT CELL SEARCH 审中-公开
标题翻译： FEMTOCELL通道分配和功率控制，用于改进FEMTOCELL覆盖和有效的细胞搜索
公开(公告)号：WO2009142954A1
公开(公告)日：2009-11-26
申请号：PCT/US2009/043573
申请日：2009-05-12
申请人： NTT DOCOMO INC. , GUVENC, Ismail , JEONG, Moo, Ryong , WATANABE, Fujio , INAMURA, Hiroshi
发明人： GUVENC, Ismail , JEONG, Moo, Ryong , WATANABE, Fujio , INAMURA, Hiroshi
IPC分类号： H04W36/00
CPC分类号： H04W16/10 , H04W16/30 , H04W52/243 , H04W52/244 , H04W52/343 , H04W52/40 , H04W72/02 , H04W72/0453 , H04W72/082 , H04W84/045
摘要： A method and a communication system for efficiently managing interference between femtocells and between each femtocell and a macrocell. The disclosed frequency assignment scheme for the femtocells minimizes interference between a femtocell and a macrocell and among different femtocells using a spectrum-sensing technique. The scheme selects a suitable channel from a set of candidate channels and ensures that the femtocell has an acceptable coverage area even when it is close to the macrocell base station. Additionally, the frequency assignment scheme favors a co-channel implementation to take advantage of the hand-off and cell search characteristics. In one embodiment, a joint power control and frequency band assignment technique partitions the coverage area of the macrocell into an inner region, a power control region, and an outer region. Power control may be used within the power-control region while, in the other regions, a fixed transmission power may be used.
摘要翻译：一种用于有效地管理毫微微小区之间以及每个毫微微小区与宏小区之间的干扰的方法和通信系统。所公开的毫微微小区的频率分配方案使用频谱感测技术来最小化毫微微小区和宏小区之间以及不同毫微微小区之间的干扰。该方案从一组候选信道中选择合适的信道，并确保毫微微小区即使在靠近宏小区基站时也具有可接受的覆盖区域。此外，频率分配方案有利于同信道实现以利用切换和小区搜索特性。在一个实施例中，联合功率控制和频带分配技术将宏小区的覆盖区域划分为内部区域，功率控制区域和外部区域。功率控制可以在功率控制区域内使用，而在其它区域中可以使用固定的发射功率。

3. 发明申请

WO2011123466A1 SYSTEM AND METHOD FOR INTER-CELL INTERFERENCE AVOIDANCE IN CO-CHANNEL NETWORKS 审中-公开
标题翻译：系统和方法用于同信道网络中的细胞间干扰避免
公开(公告)号：WO2011123466A1
公开(公告)日：2011-10-06
申请号：PCT/US2011/030385
申请日：2011-03-29
申请人： NTT DOCOMO, INC. , GUVENC, Ismail , WATANABE, Fujio , JEONG, Moo, Ryong
发明人： GUVENC, Ismail , WATANABE, Fujio , JEONG, Moo, Ryong
IPC分类号： H04W16/14
CPC分类号： H04W72/1231 , H04L5/0032 , H04L5/0058
摘要： Systems and methods are provided for a distributed inter-cell interference avoidance (ICIA) technique for avoiding co-channel interference between femtocell networks and macrocell networks. At the macrocell, user equipments sense the downlink (DL) spectrum and detects whether there are any nearby interfering femtocells. If there is any interference, a macrocell base station appropriately re-schedules the DL resources and also uses a mapping function to re-schedule uplink (UL) resources based on the re-scheduled DL resources. At the femtocell, a femtocell base station senses the UL spectrum to detect for interference from nearby macrocell users. If there is interference, femtocell gives priority to the macrocell by releasing UL resources. Femtocell may also use the same mapping function to obtain the DL resources used by the macrocell and to re-schedule DL resources of the femtocell to avoid using the DL resources of the macrocell.
摘要翻译：提供了用于分散小区间干扰避免（ICIA）技术的系统和方法，用于避免毫微微小区网络与宏小区网络之间的同信道干扰。在宏小区，用户设备检测下行链路（DL）频谱，并检测是否有任何附近的干扰毫微微小区。如果存在干扰，则宏小区基站适当地重新调度DL资源，并且还使用映射函数来基于重新调度的DL资源重新调度上行链路（UL）资源。在毫微微小区，毫微微小区基站感测到UL频谱以检测来自附近的宏小区用户的干扰。如果存在干扰，则通过释放UL资源，毫微微小区优先考虑宏小区。毫微微小区也可以使用相同的映射函数来获得由宏小区使用的DL资源，并重新调度毫微微小区的DL资源，以避免使用宏小区的DL资源。

4. 发明申请

WO2009058742A2 SYNCHRONIZED MULTI-LINK TRANSMISSION IN AN ARQ-ENABLED MULTI-HOP WIRELESS NETWORK 审中-公开
标题翻译：同步多链路无线网络中的多链路传输
公开(公告)号：WO2009058742A2
公开(公告)日：2009-05-07
申请号：PCT/US2008/081369
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： H04W56/00
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：本文公开了用于支持ARQ的多跳无线网络中的同步多链路传输的方法和设备。在一个实施例中，该方法包括执行分组的预先传输到跳跃，以使基站和网络中的多个跳跃同步地将分组传输到无线通信系统中的一个或多个移动台; 以及如果在作为整体的路径的同步传输时间之前剩余的时间大于阈值，则在形成网络中的路径的一组一个或多个跳点处执行分组的一次或多次重传。

5. 发明申请

WO2008124535A3 UPLINK MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) AND COOPERATIVE MIMO TRANSMISSIONS 审中-公开
公开(公告)号：WO2008124535A3
公开(公告)日：2008-10-16
申请号：PCT/US2008/059307
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： H04L27/00
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.

6. 发明申请

WO2009111392A2 OFDMA-BASED CO-CHANNEL FEMTOCELL 审中-公开
标题翻译：基于OFDMA的CO信道FEMTOCELL
公开(公告)号：WO2009111392A2
公开(公告)日：2009-09-11
申请号：PCT/US2009/035716
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： H04W72/00
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副载波分配图和频谱感测操作来选择用于其移动台的子载波来增加在宏小区频谱内以同信道方式工作的宏蜂窝网络的效率和覆盖。通过仅选择未由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到的信号中消除干扰。毫微微小区使用的子载波的选择可以考虑检测到的载波间干扰。

7. 发明申请

WO2009035952A1 METHOD FOR AN IMPROVED LINEAR LEAST SQUARES ESTIMATION OF A MOBILE TERMINAL'S LOCATION UNDER LOS AND NLOS CONDITIONS AND USING MAP INFORMATION 审中-公开
标题翻译：改进的线性最小二乘法在LOS和NLOS条件下使用移动终端位置的方法和使用地图信息的方法
公开(公告)号：WO2009035952A1
公开(公告)日：2009-03-19
申请号：PCT/US2008/075634
申请日：2008-09-08
申请人： NTT DOCOMO INC. , GUVENC, Ismail , WATANABE, Fujio , INAMURA, Hiroshi
发明人： GUVENC, Ismail , WATANABE, Fujio , INAMURA, Hiroshi
IPC分类号： H04Q7/22
CPC分类号： H04W64/00 , G01S5/0215 , G01S5/14
摘要： A linear least squares (LLS) estimator provides a low complexity estimation of the location of a mobile terminal (MT), using one of the fixed terminals (FTs) as a reference FT to derive a linear model. A method for selecting a reference FT is disclosed, which improves the location accuracy relative to an arbitrary approach to selecting the reference FT. In addition, a covariance-matrix based LLS estimator is proposed in line-of-sight (LOS) and non-LOS (NLOS) environments to further provide accuracy, taking advantage of the correlation of the observations. Different techniques for selecting the reference FT under non-LOS (NLOS) conditions are disclosed. A map-based two-stage LLS estimator assists in selecting the reference FT under NLOS conditions.
摘要翻译：线性最小二乘法（LLS）估计器使用固定终端（FT）中的一个作为参考FT提供对移动终端（MT）的位置的低复杂度估计，以导出线性模型。公开了一种用于选择参考FT的方法，其相对于选择参考FT的任意方法提高了位置精度。此外，在视距（LOS）和非LOS（NLOS）环境中提出了基于协方差矩阵的LLS估计器，以进一步提供准确性，利用观测的相关性。公开了在非LOS（NLOS）条件下选择参考FT的不同技术。基于地图的两级LLS估计器有助于在NLOS条件下选择参考FT。

8. 发明申请

WO2009006092A1 METHOD AND SYSTEM FOR A RELIABLE RELAY-ASSOCIATED AND OPPORTUNISTIC COOPERATIVE TRANSMISSION SCHEMES 审中-公开
标题翻译：可靠的中继和机会合作传输方案的方法和系统
公开(公告)号：WO2009006092A1
公开(公告)日：2009-01-08
申请号：PCT/US2008/067990
申请日：2008-06-24
申请人： NTT DOCOMO INC. , WANG, Dandan , CHONG, Chia-chin , GUVENC, Ismail , WATANABE, Fujio
发明人： WANG, Dandan , CHONG, Chia-chin , GUVENC, Ismail , WATANABE, Fujio
IPC分类号： H04B7/00 , H04B15/00
CPC分类号： H04B7/026 , H04B7/15592
摘要： A cooperative communication scheme is provided for a base station (BS) to communicate with a mobile station (MS) through a group of relay stations (RSs) The RSs serve the same target MS To ensure that reliable transmission exists between the BS and the RSs, the BS initially sends the information to all the RSs in the group The RSs then feedback their reliability values to the BS in a message If the reliability metric is greater than or equal to a threshold value, the RSs are considered reliable The reliable RSs transmit their information to the MS using a cooperative multicast transmission mode Meanwhile, the unreliable RSs within the relay group overhear the transmissions between the reliable RSs and the target MS The unreliable RSs that receive overheard packets correctly can join the cooperative transmission to provide a higher cooperative diversity gam to the target MS.
摘要翻译：提供了一种协作通信方案，用于基站（BS）通过一组中继站（RS）与移动台（MS）通信.RSs服务于相同的目标MS。为了确保BS和RS之间存在可靠的传输 BS最初将信息发送给组中的所有RS。然后，RS在消息中将其可靠性值反馈给BS。如果可靠性度量值大于或等于阈值，则将RS视为可靠可靠的RS传输它们使用协作多播传输模式向MS发送信息。同时，中继组内的不可靠RS会听到可靠的RS和目标MS之间的传输。正确接收到数据包的不可靠的RS可以加入协作传输，提供更高的协作分集 gam到目标MS。

9. 发明申请

WO2008017032A3 ITERATIVE METHOD FOR JOINTLY ESTIMATING TIME-OF-ARRIVAL OF RECEIVED SIGNALS AND TERMINAL LOCATION 审中-公开
公开(公告)号：WO2008017032A3
公开(公告)日：2008-02-07
申请号：PCT/US2007/075082
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： H04Q7/20
摘要： A method for mitigating non-line-of-sight (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 (100) determines a rough time-of-arrival (TOA) for a signal received (101) 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) (200). If the residual error is unsatisfactory, the TOAs are refined, using a search-back algorithm (400), 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 (300).

10. 发明申请

WO2010102126A1 A METHOD FOR ITERATIVE INTERFERENCE CANCELLATION FOR CO-CHANNEL MULTI-CARRIER AND NARROWBAND SYSTEMS 审中-公开
标题翻译：用于共通道多载波和窄带系统的迭代干扰消除的方法
公开(公告)号：WO2010102126A1
公开(公告)日：2010-09-10
申请号：PCT/US2010/026238
申请日：2010-03-04
申请人： NTT DOCOMO, INC. , SAHIN, Mustafa E. , GUVENC, Ismail , ARSLAN, Huseyin
发明人： SAHIN, Mustafa E. , GUVENC, Ismail , ARSLAN, Huseyin
IPC分类号： H04B1/10
CPC分类号： H04L27/2647 , H04J11/004 , H04J11/0066 , H04L5/0007 , H04L25/0204 , H04L25/0212 , H04L25/0224 , H04L25/03821
摘要： In a co-channel deployment of narrowband and multi-carrier technologies (e.g., a femtocell and a macrocell), a method provides cancelling of interference which treats the co-channel signals as desired signals and enhances each of them iteratively. At each iteration, each signal is demodulated and regenerated based on symbol decisions already made and a predetermined channel impulse response. To estimate the other (interfering) co-channel signal, the regenerated signal is subtracted from the aggregate signal. Simulations have shown that a method of the present invention can provide fundamental improvement in the performances of both interfering systems in as few as two iterations. The fundamental performance gain that can be obtained outweigh the required computational burden.
摘要翻译：在窄带和多载波技术（例如，毫微微小区和宏小区）的协同信道部署中，一种方法提供了将对等信道信号作为所需信号的干扰的取消，并且迭代地增强了每个信道。在每次迭代中，基于已经做出的符号决定和预定的信道脉冲响应来解调和再生每个信号。为了估计另一个（干扰）同信道信号，从聚合信号中减去再生信号。模拟已经表明，本发明的方法可以在两次迭代中提供两个干扰系统的性能的基本改进。可以获得的基本性能增益超过所需的计算负担。

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