公开(公告)号：US08867477B2

公开(公告)日：2014-10-21

申请号：US12674238

申请日：2008-08-06

申请人： Yang Song ,  Liyu Cai

发明人： Yang Song ,  Liyu Cai

IPC分类号： H04W72/04 ,  H04W72/12 ,  H04W28/04 ,  H04W48/20 ,  H04W48/16

CPC分类号： H04W72/1231 ,  H04B7/0632 ,  H04W28/04 ,  H04W48/16 ,  H04W48/20

摘要： In a wireless network there is a scheduling method in which a base station (BS) acquires information relevant to signal quality between the BS and each mobile terminal and reports to a scheduling apparatus. The scheduling apparatus selects a service BS for each terminal and determines a specific BS to compensate for interference; and may provide further controls to correspondingly transmit service data of the terminal to the service BS. The BS determines the serviced terminal and the terminal of which the interference is eliminated. When servicing the terminal on a time-frequency resource and eliminating the interference from other BS, the BS may only acquire channel state information of the terminal associated with the BS to the BS on the corresponding time-frequency resource and calculate a pre-coded matrix, so as to pre-code terminal service data from the service BS and generate downlink signals to be transmitted.

摘要翻译： 在无线网络中，存在一种调度方法，其中基站（BS）获取与BS与每个移动终端之间的信号质量相关的信息，并向调度设备报告。 调度设备为每个终端选择业务BS，并确定特定BS以补偿干扰; 并且可以提供进一步的控制以将终端的服务数据相应地传送到服务BS。 BS确定服务终端和消除干扰的终端。 当在时间频率资源上为终端服务并且消除来自其他BS的干扰时，BS可以仅在对应的时间 - 频率资源上向BS获取与BS相关联的终端的信道状态信息，并且计算预编码矩阵 ，以便从服务BS预编码终端服务数据并产生要发送的下行链路信号。

公开(公告)号：US08718035B2

公开(公告)日：2014-05-06

申请号：US13059701

申请日：2008-08-18

申请人： Keying Wu ,  Yang Song ,  Liyu Cai ,  Dong Li

发明人： Keying Wu ,  Yang Song ,  Liyu Cai ,  Dong Li

IPC分类号： H04J1/00

CPC分类号： H04B7/024 ,  H04B7/0495

摘要： A method and device for performing Multi-Input Multi-Output transmission to a mobile terminal in the base station devices of a wireless communication system is provided. Each base station device determines the sector coordination group used at a certain frequency band according to system settings. Each base station device only performs multiple-sector (-cell) collaborative MIMO transmission in the sector coordination group which includes the sectors governed by the base station device. A simple and effective method is provided for realizing the multiple-sector (-cell) MIMO technology, its advantages including but not limited to there being a reduced amount of information exchanged between sectors (cells), which facilitates implementation and management, and good performance in controlling interface between sectors (cells).

摘要翻译： 提供了一种用于在无线通信系统的基站设备中向移动终端执行多输入多输出传输的方法和设备。 每个基站设备根据系统设置确定在某个频带使用的扇区协调组。 每个基站设备仅在包括由基站设备管理的扇区的扇区协调组中执行多扇区（ - 小区）协作MIMO传输。 提供了一种实现多扇区（-cell）MIMO技术的简单有效的方法，其优点包括但不限于在扇区（小区）之间交换的信息量减少，这有助于实现和管理，并且具有良好的性能 在控制扇区（单元）之间的接口。

公开(公告)号：US20120020319A1

公开(公告)日：2012-01-26

申请号：US12674238

申请日：2008-08-06

申请人： Yang Song ,  Liyu Cai

发明人： Yang Song ,  Liyu Cai

IPC分类号： H04W72/04

CPC分类号： H04W72/1231 ,  H04B7/0632 ,  H04W28/04 ,  H04W48/16 ,  H04W48/20

摘要： The proposal for eliminating inter-cell interference based on cooperation with the prior base station has problems such as resources occupation and Backhaul load increment. The invention provides a multi-base station cooperative multiple-input multiple-output (MIMO) with low information interaction in a wireless network and a scheduling method and a device thereof. The scheduling method comprises: a base station acquires information relevant to signal quality between the base station and each mobile terminal and reports to a scheduling apparatus, wherein the reported signal quality relevant information is preferably a relative signal strength indicator (RSSI) or a channel quality indicator (CQI) with small data size; the scheduling apparatus selects a service base station for each mobile terminal and determines a specific base station to eliminate the interference from a specific mobile terminal; and the scheduling apparatus further controls to correspondingly transmit service data of the mobile terminal to the service base station; the base station determines the serviced terminal and the terminal of which the interference is eliminated. When servicing the mobile terminal on a time-frequency resource and eliminating the interference from other base stations, the base station only needs to acquire channel state information of the mobile terminal associated with the base station to the base station on the corresponding time-frequency resource and calculate a pre-coded matrix, so as to pre-code mobile terminal service data from the service base station and generate downlink signals to be transmitted; and the process is independently carried out in various base stations.

摘要翻译： 基于与现有基站协作消除小区间干扰的方案存在资源占用和回程负载增加等问题。 本发明提供了一种在无线网络中具有低信息交互的多基站协作多输入多输出（MIMO）及其调度方法及其装置。 调度方法包括：基站获取与基站与各移动终端之间的信号质量相关的信息，并向调度装置报告，其中所报告的信号质量相关信息优选为相对信号强度指示符（RSSI）或信道质量 指标（CQI），数据量小; 调度装置为每个移动终端选择服务基站，并确定特定基站以消除来自特定移动终端的干扰; 并且所述调度装置进一步控制将所述移动终端的服务数据相应地发送到所述服务基站; 基站确定服务终端和消除干扰的终端。 当在时间频率资源上为移动终端服务并消除其他基站的干扰时，基站仅需要在对应的时间 - 频率资源上向基站获取与基站相关联的移动终端的信道状态信息 并计算预编码矩阵，以便从服务基站预编码移动终端服务数据并生成待发送的下行链路信号; 并且该过程在各种基站中独立地进行。

公开(公告)号：US20110142164A1

公开(公告)日：2011-06-16

申请号：US13059701

申请日：2008-08-18

申请人： Keying Wu ,  Yang Song ,  Liyu Cai ,  Dong Li

发明人： Keying Wu ,  Yang Song ,  Liyu Cai ,  Dong Li

IPC分类号： H04L27/00

CPC分类号： H04B7/024 ,  H04B7/0495

摘要： A method and device for performing Multi-Input Multi-Output transmission to a mobile terminal in the base station devices of a wireless communication system is provided. Each base station device determines the sector coordination group used at a certain frequency band according to system settings. Each base station device only performs multiple-sector (-cell) collaborative MIMO transmission in the sector coordination group which includes the sectors governed by the base station device. A simple and effective method is provided for realizing the multiple-sector (-cell) MIMO technology, its advantages including but not limited to there being a reduced amount of information exchanged between sectors (cells), which facilitates implementation and management, and good performance in controlling interface between sectors (cells).

摘要翻译： 提供了一种用于在无线通信系统的基站设备中向移动终端执行多输入多输出传输的方法和设备。 每个基站设备根据系统设置确定在某个频带使用的扇区协调组。 每个基站设备仅在包括由基站设备管理的扇区的扇区协调组中执行多扇区（ - 小区）协作MIMO传输。 提供了一种实现多扇区（-cell）MIMO技术的简单有效的方法，其优点包括但不限于在扇区（小区）之间交换的信息量减少，这有助于实现和管理，并且具有良好的性能 在控制扇区（单元）之间的接口。

公开(公告)号：US08238307B2

公开(公告)日：2012-08-07

申请号：US12674092

申请日：2008-08-13

申请人： Hongwei Yang ,  Liyu Cai ,  Keying Wu ,  Dong Li

发明人： Hongwei Yang ,  Liyu Cai ,  Keying Wu ,  Dong Li

IPC分类号： H04W4/00 ,  H04W36/00 ,  H04J1/00

CPC分类号： H04B7/022 ,  H04B7/0413

摘要： A Macro-Diversity HandOver (MDHO) solution based on multi-User MIMO is provided. Multiple base stations (BSs) serve the MDHO zone. By jointly precoding the modulated signals to be sent, the multiple BSs send the precoded signals to the multiple mobile stations (MSs) over the same time-frequency resources. The signal to be sent is transmitted to the multiple MSs in the MDHO zone. Due to the adoption of the precoding technique, each MS makes no or small interference to other MSs. Since the multiple BSs that serve one MDHO zone serve multiple MSs over the same time-frequency resources, the system capacity in the MDHO zone is greatly improved.

摘要翻译： 提供了一种基于多用户MIMO的宏分集切换（MDHO）解决方案。 多个基站（BS）服务于MDHO区域。 通过联合预编码要发送的调制信号，多个BS通过相同的时间 - 频率资源向多个移动站（MS）发送预编码的信号。 要发送的信号被发送到MDHO区域中的多个MS。 由于采用了预编码技术，每个MS对其他MS没有任何或小的干扰。 由于服务于一个MDHO区域的多个BS在相同的时间 - 频率资源上服务于多个MS，所以MDHO区域中的系统容量大大提高。

公开(公告)号：US07542514B2

公开(公告)日：2009-06-02

申请号：US10875689

申请日：2004-06-25

申请人： Pengpeng Song ,  Liyu Cai ,  Yan Wan

发明人： Pengpeng Song ,  Liyu Cai ,  Yan Wan

IPC分类号： H04K1/10

CPC分类号： H04L1/0019 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/20 ,  H04L27/2608

摘要： The present invention discloses a method and device for adaptive modulation and coding based on second order statistics of channel information in OFDM system, characterized in that, by means of variance of Signal-to-Noise ratio (SNR) an appropriate adaptation time window is selected dynamically to trace time-varying channel better; and in that a decision criterion of second order, namely selecting an appropriate modulation and coding schemes (MCS) according to average value of SNR and variance of SNR, is employed to obtain accurate mapping from SNR to MCS. The mapping enhances practicability of the adaptive modulation and coding, decreases probability of system outage, and thus results in better performance of bit error rate.

摘要翻译： 本发明公开了一种基于OFDM系统中信道信息二阶统计的自适应调制编码方法和装置，其特征在于，通过信噪比（SNR）方差，选择适当的适应时间窗 动态跟踪时变频道更好; 并且采用二阶决策标准，即根据SNR的平均值和SNR的方差来选择适当的调制和编码方案（MCS），以获得从SNR到MCS的精确映射。 该映射增强了自适应调制和编码的实用性，降低了系统中断的概率，从而导致更好的比特误码率性能。

公开(公告)号：US20070093273A1

公开(公告)日：2007-04-26

申请号：US11546315

申请日：2006-10-12

申请人： Liyu Cai

发明人： Liyu Cai

IPC分类号： H04M1/00

CPC分类号： H04B7/0452 ,  H04B7/022 ,  H04B7/0669 ,  H04B7/068

摘要： The present invention discloses a distributed base station serving mobile stations, which comprises multiple antenna-RF processing units and a central processing unit remotely connected with said multiple antenna-RF processing units. Each of the antenna-RF processing units has an antenna array formed by multiple antennas. Said central processing unit comprises: an MIMO coding unit for MIMO coding of data of each of the mobile stations so that data of each of the mobile stations generates multi-path data symbols; a beam-forming unit for multiplying each path data symbol of the multi-path data symbols of each of the mobile stations by a weighted coefficient vector corresponding to this path data symbol, to obtain beam-forming data of each path data symbol of each of the mobile stations; and an overlapping unit for, with respect to each antenna in said antenna-RF processing units, overlapping beam-forming data of the respective mobile stations for this antenna and feeding the overlapped beam-forming data to this antenna for transmission. The present invention further discloses a communication system having the above distributed base station and the corresponding signal transmission method.

摘要翻译： 本发明公开了一种服务于移动站的分布式基站，包括多个天线RF处理单元和与所述多个天线RF处理单元远程连接的中央处理单元。 每个天线RF处理单元具有由多个天线形成的天线阵列。 所述中央处理单元包括：MIMO编码单元，用于对每个移动台的数据进行MIMO编码，使得每个移动站的数据产生多路数据符号; 波束形成单元，用于将每个移动站的多路径数据符号的每个路径数据符号乘以与该路径数据符号相对应的加权系数向量，以获得每个路径数据符号的每个路径数据符号的波束形成数据 移动台; 以及相对于所述天线RF处理单元中的每个天线，用于该天线的各个移动台的重叠波束形成数据并将重叠的波束形成数据馈送到该天线以进行传输的重叠单元。 本发明还公开了一种具有上述分布式基站和对应的信号传输方法的通信系统。

公开(公告)号：US08248909B2

公开(公告)日：2012-08-21

申请号：US12296841

申请日：2007-04-09

申请人： Dong Li ,  Guosong Li ,  Xialong Zhu ,  Hongwei Yang ,  Liyu Cai

发明人： Dong Li ,  Guosong Li ,  Xialong Zhu ,  Hongwei Yang ,  Liyu Cai

IPC分类号： H04J11/00

CPC分类号： H04L25/03159 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0668 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/0046 ,  H04L27/2605 ,  H04L27/261 ,  H04L27/2636

摘要： A method and device for the baseband process of space-time/space-frequency/spatial diversity transmitter in the SC-FDMA system, the device is characterized in that: 1) an encoding means is connected to the output end of the M-point DFT module; 2) a space-time encoding means, for encoding the corresponding symbol of at least two adjacent symbol sets, and outputting at least two data sets; each sub-carrier mapping means maps respectively each data set to the corresponding antenna, so that the mapped data satisfy the requirements: The symbols mapped on each antenna keep the same sequence as the M symbols outputted by the M-point DFT module; the mapped symbols keep the same sub-carrier interval; the M data of each mapped SC-FDMA symbol are the M outputted data of the DFT module, or the inverse of the M outputted data, or the complex conjugate of the M outputted data, or the inverse complex conjugate of the M outputted data. The present invention implements effective space diversity, reduces PAPR, and makes frequency domain equalization feasible.

摘要翻译： 一种用于SC-FDMA系统中的时空/空频/空间分集发射机基带处理的方法和装置，其特征在于：1）编码装置连接到M点的输出端 DFT模块; 2）空时编码装置，用于编码至少两个相邻符号集的对应符号，并输出至少两个数据集; 每个子载波映射装置分别将每个数据集映射到相应的天线，使得映射的数据满足要求：映射在每个天线上的符号保持与M点DFT模块输出的M个符号相同的序列; 映射的符号保持相同的子载波间隔; 每个映射的SC-FDMA符号的M数据是DFT模块的M个输出数据，或M个输出数据的逆，或M个输出数据的复共轭，或M个输出数据的反复共轭。 本发明实现有效的空间分集，减少PAPR，使得频域均衡成为可能。

公开(公告)号：US20120052896A1

公开(公告)日：2012-03-01

申请号：US13266724

申请日：2009-04-28

申请人： Dong Li ,  Liyu Cai

发明人： Dong Li ,  Liyu Cai

IPC分类号： H04W28/18

CPC分类号： H04B7/0413 ,  H04B7/0669 ,  H04L5/0032

摘要： A mobile communication method, a base station and a mobile communication system employing a hierarchical virtual antenna architecture are disclosed. The method comprises steps of: negotiating, by a first base station, with a second base station about a transmission mode with a mobile station; and according to the negotiated transmission mode, negotiating, by the first base station, with the second base station about respective demodulation reference signal frequency pattern allocation and measurement reference signal frequency pattern allocation in the hierarchical virtual antenna architecture. The flexible and effective reference signals may be realized in various multi-cell Multiple-Input Multiple-Output (MIMO) operation modes by the method.

摘要翻译： 公开了一种采用分层虚拟天线架构的移动通信方法，基站和移动通信系统。 该方法包括以下步骤：由第一基站与移动台协商关于传输模式的第二基站; 并且根据协商的传输模式，由第一基站与第二基站协商关于分层虚拟天线架构中的各个解调参考信号频率模式分配和测量参考信号频率模式分配。 可以通过该方法在各种多小区多输入多输出（MIMO）操作模式中实现灵活和有效的参考信号。

公开(公告)号：US20100303170A1

公开(公告)日：2010-12-02

申请号：US12599491

申请日：2007-05-10

申请人： Xiaolong Zhu ,  Hongwei Yang ,  Liyu Cai

发明人： Xiaolong Zhu ,  Hongwei Yang ,  Liyu Cai

IPC分类号： H04L25/03 ,  H04L27/00 ,  H04L25/49

CPC分类号： H04B7/0417 ,  H04B7/0617 ,  H04B7/0689

摘要： A method for pre-processing data to be transmitted in a multiple-input communication system comprises the following steps: generating a beamforming matrix and a pre-coding matrix; combining the beamforming matrix and the pre-coding matrix to generate a weight matrix; and pre-processing the data by using the generated weight matrix. There are also provided a transmitter, a base station, and a communication system using the method.

摘要翻译： 一种用于预处理在多输入通信系统中发送的数据的方法包括以下步骤：产生波束成形矩阵和预编码矩阵; 组合波束形成矩阵和预编码矩阵以生成权重矩阵; 并通过使用生成的权重矩阵来预处理数据。 还提供了一种发射机，基站和使用该方法的通信系统。