公开(公告)号：US20100135177A1

公开(公告)日：2010-06-03

申请号：US12599479

申请日：2007-05-10

申请人： Hao Liu ,  Yang Song ,  Xiaolong Zhu

发明人： Hao Liu ,  Yang Song ,  Xiaolong Zhu

IPC分类号： H04L12/26 ,  H04B7/14 ,  H04W72/12

CPC分类号： H04W72/1268 ,  H04B7/155 ,  H04B7/2606 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0058 ,  H04L25/0204 ,  H04L25/0242 ,  H04L25/03343 ,  H04W84/047

摘要： The present invention provides a method for scheduling uplink transmission in a relay-based wireless communication system. The method comprises: estimating step for estimating equivalent uplink channels of respective users whose uplink transmission is performed via a same relay station; calculating step for calculating orthogonality between the equivalent channels of said users; selecting step for selecting a combination of virtual multiple input multiple output users from said users, wherein the equivalent channels of the users in said combination of virtual multiple input multiple output users is conformable to the requirement of orthogonality; and scheduling step for scheduling the respective users in said combination of virtual multiple input multiple output users to perform uplink transmission cooperatively with a same time or frequency resource. By the present invention, time or frequency resource can be effectively saved without apparently reducing system capacity when the system's radio resource is scarce, and a proper quality of the signal receiption at the base station side is maintained.

摘要翻译： 本发明提供一种用于在基于中继的无线通信系统中调度上行链路传输的方法。 该方法包括：估计用于估计经由同一中继站执行上行链路传输的各个用户的等效上行链路信道的步骤; 用于计算所述用户的等效信道之间的正交性的计算步骤; 选择步骤，用于从所述用户中选择虚拟多输入多输出用户的组合，其中虚拟多输入多输出用户组合中的用户的等效信道符合正交性要求; 以及调度步骤，用于在虚拟多输入多输出用户的所述组合中调度各个用户，以与相同的时间或频率资源协同地执行上行链路传输。 通过本发明，当系统的无线电资源很少时，可以有效地节省时间或频率资源，而不会明显降低系统容量，并且维持在基站侧的信号接收的适当质量。

公开(公告)号：US08655281B2

公开(公告)日：2014-02-18

申请号：US13264495

申请日：2009-04-16

申请人： Keying Wu ,  Yang Song ,  Xiaolong Zhu

发明人： Keying Wu ,  Yang Song ,  Xiaolong Zhu

IPC分类号： H04B1/00 ,  H04B15/00

CPC分类号： H04W72/0426 ,  H04B7/024 ,  H04B7/0413 ,  H04L5/0035 ,  H04L5/0073

摘要： According to an embodiment of the present invention, on a radio resource block for Multi-BS MIMO, one of the coordinating base stations selects a mobile terminal at first, and informs the other base stations of the characterization information and the pre-coding information etc. of the selected mobile terminal, and the selection made by the other base stations will obey the selection result of the base station that selects at first. By applying the method and apparatus provided by the present invention, the joint selection of object terminals in the Multi-BS MIMO is realized, and such selection is distributed without any central scheduling device which is necessary in the central scheduling scheme. In addition, only very limited information exchange among the coordinating base stations is required to realize the present invention. According to an embodiment of the present invention, the object terminals selected by the coordinating base stations are matched well with each other such that the total performance of the system is improved; according to an embodiment of the present invention, the fairness among the base stations can be well satisfied.

摘要翻译： 根据本发明的实施例，在多BS MIMO的无线资源块中，协调基站之一首先选择移动终端，并向其他基站通知特征信息和预编码信息等 ，并且由其他基站进行的选择将服从首先选择的基站的选择结果。 通过应用本发明提供的方法和装置，实现了多BS MIMO中的对象终端的联合选择，并且在中央调度方案中不需要任何中央调度装置的情况下分发这种选择。 此外，为了实现本发明，需要协调基站之间的非常有限的信息交换。 根据本发明的实施例，由协调基站选择的对象终端彼此匹配，从而提高了系统的总体性能; 根据本发明的实施例，可以很好地满足基站之间的公平性。

公开(公告)号：US08615049B2

公开(公告)日：2013-12-24

申请号：US13258708

申请日：2009-03-25

申请人： Keying Wu ,  Xiaolong Zhu ,  Yang Song

发明人： Keying Wu ,  Xiaolong Zhu ,  Yang Song

IPC分类号： H04B15/00 ,  H04L27/28

CPC分类号： H04B7/0417 ,  H04B7/024 ,  H04B7/0634

摘要： The present invention provides a method and an apparatus of controlling co-channel interference in a base station of a wireless communication system based on collaborative MIMO and the corresponding method and apparatus of assisting a serving base station to control co-channel interference in a mobile station of a wireless communication system based on collaborative MIMO. Since the feedback mechanism based on the codebook is employed in the collaborative MIMO system in the present invention to enable the BS to obtain the precoding information, the present invention can be used to the both TDD mode and FDD mode. Moreover, since the precoding vectors selected by the different mobile stations for a same BS are always orthogonal, multi-user co-channel interference can be reduced.

摘要翻译： 本发明提供了一种基于协同MIMO控制无线通信系统的基站中的同频干扰的方法和装置，以及辅助服务基站控制移动台中的同频干扰的相应方法和装置 基于协作MIMO的无线通信系统。 由于在本发明的协作MIMO系统中采用基于码本的反馈机制，以使得BS能够获得预编码信息，本发明可以用于TDD模式和FDD模式。 此外，由于用于相同BS的不同移动台选择的预编码向量总是正交的，所以可以减少多用户同信道干扰。

公开(公告)号：US20110255625A1

公开(公告)日：2011-10-20

申请号：US13142121

申请日：2008-12-31

申请人： Yang Song ,  Xiaolong Zhu ,  Dong Li

发明人： Yang Song ,  Xiaolong Zhu ,  Dong Li

IPC分类号： H04B7/02

CPC分类号： H04B7/024 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/0639

摘要： The present invention provides a novel codebook-based multi-base station unite pre-coding scheme. In this invention, multiple cooperating base stations commonly transmit signals to a mobile terminal. The mobile terminal estimates a channel matrix of a unite MIMO channel from the multiple cooperating base stations, and selects the optimal pre-coding matrix index from the pre-coding matrix codebook based on the unite MIMO channel matrix and feeds it back to the multiple cooperating base stations. Each cooperating base station selects the optimal pre-coding matrix based on the received pre-coding matrix index and uses the corresponding portion of the pre-coding matrix to perform unite pre-coding on the data. Namely, the respective partial pre-coding matrixes as employed by all cooperating base stations together form the pre-coding matrix that is optimal to the mobile terminal, and the pre-coding matrix as used by respective cooperating base stations is a part of the optimal pre-coding matrix. By using the codebook-based multi-base station unite pre-coding scheme according to the present invention, the user performance is improved, the complexity of implementation is low, and the demand on network connecting the base stations is very low.

摘要翻译： 本发明提供了一种新颖的基于码本的多基站联合预编码方案。 在本发明中，多个协作基站通常向移动终端发送信号。 移动终端估计来自多个协作基站的单一MIMO信道的信道矩阵，并且基于单一MIMO信道矩阵从预编码矩阵码本中选择最佳预编码矩阵索引，并将其馈送回到多个协作基站 基站 每个协作基站基于接收到的预编码矩阵索引选择最优预编码矩阵，并使用预编码矩阵的相应部分对该数据执行一致的预编码。 也就是说，由所有协作的基站采用的各个部分预编码矩阵一起形成对于移动终端是最佳的预编码矩阵，并且由各个协作的基站使用的预编码矩阵是最优的 预编码矩阵。 通过使用根据本发明的基于码本的多基站联合预编码方案，提高了用户性能，实现的复杂度低，并且对连接基站的网络的需求非常低。

公开(公告)号：US09071291B2

公开(公告)日：2015-06-30

申请号：US13125304

申请日：2008-10-31

申请人： Xiaolong Zhu ,  Dong Li ,  Yang Song

发明人： Xiaolong Zhu ,  Dong Li ,  Yang Song

IPC分类号： H04W36/00 ,  H04B7/02 ,  H04W72/12 ,  H04L5/00

CPC分类号： H04B7/024 ,  H04L5/0014 ,  H04L5/0035 ,  H04L5/0094 ,  H04W72/1278

摘要： A solution for multiple base station collaborative communication in TDD (Time Division Duplex) and FDD (Frequency Division Duplex) systems is provided. To be specific, a serving base station and coordinating base station transmit detection signals with specific Multiple Input Multiple Output (MIMO) features on one or more communication resources. The mobile station measures the detection signals on the one or more communication resources and generates indication information of the recommended collaborative communication modes based on the measurement results. Preferably the indexes of the time-frequency resources corresponding to the recommended collaborative communication modes are reported to the serving base station. Then the serving base station schedules at least one of the one or more mobile stations according to the indication information reported by the one or more stations and provides MIMO communication manner for the mobile station scheduled. The coverage of the cells is improved, the cell edge user throughput is increased and the inter-cell interference between neighboring base stations is decreased by exploiting the invention. Preferably the amount of uplink feedback information is decreased and the uplink bandwidth is saved.

摘要翻译： 提供了TDD（时分双工）和FDD（Frequency Division Duplex）系统中多基站协同通信的解决方案。 具体来说，服务基站和协调基站在一个或多个通信资源上传送具有特定多输入多输出（MIMO）特征的检测信号。 移动站测量一个或多个通信资源上的检测信号，并基于测量结果生成推荐的协作通信模式的指示信息。 优选地，将与推荐的协作通信模式相对应的时间 - 频率资源的索引报告给服务基站。 然后，服务基站根据由一个或多个站报告的指示信息来调度一个或多个移动站中的至少一个，并为调度的移动站提供MIMO通信方式。 改善了小区的覆盖范围，通过利用本发明，增加了小区边缘用户吞吐量并减少了相邻基站之间的小区间干扰。 优选地，上行链路反馈信息的量减少，并且保存上行链路带宽。

公开(公告)号：US20120040702A1

公开(公告)日：2012-02-16

申请号：US13264495

申请日：2009-04-16

申请人： Keying Wu ,  Yang Song ,  Xiaolong Zhu

发明人： Keying Wu ,  Yang Song ,  Xiaolong Zhu

IPC分类号： H04B15/00 ,  H04W4/00

CPC分类号： H04W72/0426 ,  H04B7/024 ,  H04B7/0413 ,  H04L5/0035 ,  H04L5/0073

摘要： According to an embodiment of the present invention, on a radio resource block for Multi-BS MIMO, one of the coordinating base stations selects a mobile terminal at first, and informs the other base stations of the characterization information and the pre-coding information etc. of the selected mobile terminal, and the selection made by the other base stations will obey the selection result of the base station that selects at first. By applying the method and apparatus provided by the present invention, the joint selection of object terminals in the Multi-BS MIMO is realized, and such selection is distributed without any central scheduling device which is necessary in the central scheduling scheme. In addition, only very limited information exchange among the coordinating base stations is required to realize the present invention. According to an embodiment of the present invention, the object terminals selected by the coordinating base stations are matched well with each other such that the total performance of the system is improved; according to an embodiment of the present invention, the fairness among the base stations can be well satisfied.

摘要翻译： 根据本发明的实施例，在多BS MIMO的无线资源块中，协调基站之一首先选择移动终端，并向其他基站通知特征信息和预编码信息等 ，并且由其他基站进行的选择将服从首先选择的基站的选择结果。 通过应用本发明提供的方法和装置，实现了多BS MIMO中的对象终端的联合选择，并且在中央调度方案中不需要任何中央调度装置的情况下分发这种选择。 此外，为了实现本发明，需要协调基站之间的非常有限的信息交换。 根据本发明的实施例，由协调基站选择的对象终端彼此匹配，从而提高了系统的总体性能; 根据本发明的实施例，可以很好地满足基站之间的公平性。

公开(公告)号：US20110207494A1

公开(公告)日：2011-08-25

申请号：US13125304

申请日：2008-10-31

申请人： Xiaolong Zhu ,  Dong Li ,  Yang Song

发明人： Xiaolong Zhu ,  Dong Li ,  Yang Song

IPC分类号： H04B7/26

CPC分类号： H04B7/024 ,  H04L5/0014 ,  H04L5/0035 ,  H04L5/0094 ,  H04W72/1278

摘要： A solution for multiple base station collaborative communication in TDD (Time Division Duplex) and FDD (Frequency Division Duplex) systems is provided. To be specific, a serving base station and coordinating base station transmit detection signals with specific Multiple Input Multiple Output (MIMO) features on one or more communication resources. The mobile station measures the detection signals on the one or more communication resources and generates indication information of the recommended collaborative communication modes based on the measurement results. Preferably the indexes of the time-frequency resources corresponding to the recommended collaborative communication modes are reported to the serving base station. Then the serving base station schedules at least one of the one or more mobile stations according to the indication information reported by the one or more stations and provides MIMO communication manner for the mobile station scheduled. The coverage of the cells is improved, the cell edge user throughput is increased and the inter-cell interference between neighboring base stations is decreased by exploiting the invention. Preferably the amount of uplink feedback information is decreased and the uplink bandwidth is saved.

摘要翻译： 提供了TDD（时分双工）和FDD（Frequency Division Duplex）系统中多基站协同通信的解决方案。 具体来说，服务基站和协调基站在一个或多个通信资源上传送具有特定多输入多输出（MIMO）特征的检测信号。 移动站测量一个或多个通信资源上的检测信号，并基于测量结果生成推荐的协作通信模式的指示信息。 优选地，将与推荐的协作通信模式相对应的时间 - 频率资源的索引报告给服务基站。 然后，服务基站根据由一个或多个站报告的指示信息来调度一个或多个移动站中的至少一个，并为调度的移动站提供MIMO通信方式。 改善了小区的覆盖范围，通过利用本发明，增加了小区边缘用户吞吐量并减少了相邻基站之间的小区间干扰。 优选地，上行链路反馈信息的量减少，并且保存上行链路带宽。

公开(公告)号：US20110164526A1

公开(公告)日：2011-07-07

申请号：US13062026

申请日：2008-09-05

申请人： Xiaolong Zhu ,  Yang Song

发明人： Xiaolong Zhu ,  Yang Song

IPC分类号： H04J1/16 ,  H04J1/02

CPC分类号： H04L5/0051 ,  H04L5/0023 ,  H04L5/006 ,  H04L25/0224

摘要： The present invention provides a new method and apparatus, in a network device of a multi-carrier based wireless access network, for transmitting uplink data to access device side, and the corresponding method and apparatus for channel estimation in its uplink counterpart device, wherein, a plurality of network device comprise one or more multi-antenna network devices, at least one of the multi-antenna network device transmits multipath subcarrier modulated symbols via a plurality of transmitting antennas configured for itself, wherein, at least two transmitting antennas use different subcarrier sets, but share one pilot pattern, wherein, pilot pattern used by each network device is different from the pilot pattern used by any other network device. The present invention not only can fully utilize the frequency diversity introduced by the plurality of transmitting antennas, but also can guarantee a relative high antenna power gain and save as much time-frequency resource cost caused by pilot signal as possible.

摘要翻译： 本发明提供了一种在基于多载波的无线接入网络的网络设备中用于向接入设备侧发送上行数据的新方法和装置，以及用于其上行对等设备中的信道估计的相应方法和装置，其中， 多个网络设备包括一个或多个多天线网络设备，所述多天线网络设备中的至少一个经由为其自身配置的多个发射天线发射多径副载波调制符号，其中至少两个发射天线使用不同的子载波 设置但共享一个导频模式，其中，每个网络设备使用的导频模式不同于任何其他网络设备使用的导频模式。 本发明不仅可以充分利用由多个发送天线引入的频率分集，还可以保证相对较高的天线功率增益，并且尽可能节省由导频信号引起的时间 - 频率资源成本。

公开(公告)号：US20120014468A1

公开(公告)日：2012-01-19

申请号：US13258708

申请日：2009-03-25

申请人： Keying Wu ,  Xiaolong Zhu ,  Yang Song

发明人： Keying Wu ,  Xiaolong Zhu ,  Yang Song

IPC分类号： H04B15/00 ,  H04L27/28

CPC分类号： H04B7/0417 ,  H04B7/024 ,  H04B7/0634

摘要： The present invention provides a method and an apparatus of controlling co-channel interference in a base station of a wireless communication system based on collaborative MIMO and the corresponding method and apparatus of assisting a serving base station to control co-channel interference in a mobile station of a wireless communication system based on collaborative MIMO. Since the feedback mechanism based on the codebook is employed in the collaborative MIMO system in the present invention to enable the BS to obtain the precoding information, the present invention can be used to the both TDD mode and FDD mode. Moreover, since the precoding vectors selected by the different mobile stations for a same BS are always orthogonal, multi-user co-channel interference can be reduced.

摘要翻译： 本发明提供了一种基于协同MIMO控制无线通信系统的基站中的同频干扰的方法和装置，以及辅助服务基站控制移动台中的同频干扰的相应方法和装置 基于协作MIMO的无线通信系统。 由于在本发明的协作MIMO系统中采用基于码本的反馈机制，以使得BS能够获得预编码信息，本发明可以用于TDD模式和FDD模式。 此外，由于用于相同BS的不同移动台选择的预编码向量总是正交的，所以可以减少多用户同信道干扰。

公开(公告)号：US08861639B2

公开(公告)日：2014-10-14

申请号：US13822456

申请日：2011-08-24

申请人： Lu Wu ,  Jinhui Chen ,  Yang Song ,  Hongwei Yang ,  Di Lv ,  Hao Liu

发明人： Lu Wu ,  Jinhui Chen ,  Yang Song ,  Hongwei Yang ,  Di Lv ,  Hao Liu

IPC分类号： H04L27/00 ,  H04B7/06 ,  H04L25/03 ,  H04B7/04

CPC分类号： H04B7/0456 ,  H04B7/0426 ,  H04B7/0469 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/065 ,  H04L25/03343

摘要： A method for determining precoding matrix for the sub-band precoding in a transmitter with M transmitting antennas. The method includes determining an optimized first matrix W1 according to wideband and/or long-term channel properties, multiplying the optimized first matrix W1, with each second matrix W2, in a second codebook, to obtain a plurality of candidate precoding matrices, the second matrix W2 corresponds to frequency-selective and/or short-term channel properties; selecting an optimized one from the plurality of candidate preceding matrices for precoding the data to be transmitted, according to a frequency selection and/or a short-term channel state information. The amount of DFT beams may be increased to improve the spatial resolution; a diagonal matrix is involved in the first matrix W1; and phase adjustment is involved in the second matrix W2, so as to guarantee the adjusted phase is evenly distributed among the whole phase space.

摘要翻译： 一种用于确定具有M个发射天线的发射机中的子带预编码的预编码矩阵的方法。 该方法包括：根据宽带和/或长期信道特性，在第二码本中将优化的第一矩阵W1与每个第二矩阵W2相乘，以确定优化的第一矩阵W1，以获得多个候选预编码矩阵，第二 矩阵W2对应于频率选择和/或短期信道特性; 根据频率选择和/或短期信道状态信息，从所述多个候选先前矩阵中选择优化的一个，用于对要发送的数据进行预编码。 可以增加DFT光束的量以提高空间分辨率; 对角矩阵涉及第一矩阵W1; 并且第二矩阵W2中涉及相位调整，以保证调整后的相位在整个相位空间内均匀分布。