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1. 发明授权

US08867477B2 Cooperative MIMO among base stations with low information interaction, a method and apparatus for scheduling the same 有权
标题翻译：具有低信息交互的基站之间的合作MIMO，用于调度相同的方法和装置
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。

2. 发明授权

US08718035B2 Method and device for realizing grouping in multi-input multi-output transmission with multiple-sector coordination 失效
标题翻译：多输入多输出多输出传输中实现分组的方法和装置
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。

3. 发明申请

US20120020319A1 COOPERATIVE MIMO AMONG BASE STATIONS WITH LOW INFORMATION INTERACTION, A METHOD AND APPARATUS FOR SCHEDULING THE SAME 有权
标题翻译：具有低信息交互的基站中的协同MIMO，用于调度其的方法和装置
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。

4. 发明申请

US20110142164A1 METHOD AND DEVICE FOR REALIZING GROUPING IN MULTI-INPUT MULTI-OUTPUT TRANSMISSION WITH MULTIPLE-SECTOR COORDINATION 失效
标题翻译：用于实现多输入多输出多传输协调分组的方法和装置
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。

5. 发明授权

US08238307B2 Method and device for canceling the interference among signals received by multiple mobile stations 有权
标题翻译：消除由多个移动台接收的信号之间的干扰的方法和装置
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。

6. 发明授权

US07542514B2 Method and device for adaptive modulation and coding based on second order statistics of channel information 有权
标题翻译：基于信道信息二阶统计的自适应调制编码方法和装置
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。

7. 发明申请

US20070093273A1 Distributed base station, communication system, and signal transmission method thereof 有权
标题翻译：分布式基站，通信系统及其信号传输方法
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。

8. 发明授权

US08964869B2 Pre-coding method and apparatus 有权
标题翻译：预编码方法和装置
公开(公告)号：US08964869B2
公开(公告)日：2015-02-24
申请号：US13391014
申请日：2009-08-18
申请人： Dong Li , Liyu Cai
发明人： Dong Li , Liyu Cai
IPC分类号： H04B7/02 , H04L25/49 , H04B7/04
CPC分类号： H04B7/022 , H04B7/0452 , H04B7/0478
摘要： The present invention provides a pre-coding method in a multi-user macro-diversity transmission system. The method comprises: obtaining, for a mobile station in the multi-user macro-diversity transmission system, a first sub-precoder that guarantees orthogonality between equivalent channels of users; obtaining a second sub-precoder by performing QR decomposition based on equivalent channels precoded through the first sub-precoder; obtaining a final pre-coder with respect to the mobile station by combining the first sub-precoder and the second sub-precoder; and performing pre-coding on data of the mobile station with the final precoder The present invention further provides a corresponding base station and a multi-user macro-diversity transmission system. Through the technical solution of the present invention, the multi-user macro-diversity transmission system may achieve more macro-diversity gain, thereby greatly enhancing the performance of the multi-user macro-diversity transmission.
摘要翻译：本发明提供了一种多用户宏分集传输系统中的预编码方法。该方法包括：为多用户宏分集传输系统中的移动台获得保证用户等效信道之间的正交性的第一子预编码器; 通过基于通过第一子预编码器预编码的等效信道执行QR分解来获得第二子预编码器; 通过组合第一子预编码器和第二子预编码器获得关于移动台的最终预编码器; 并利用最终预编码器对移动台的数据执行预编码本发明还提供了一种相应的基站和多用户宏分集传输系统。通过本发明的技术方案，多用户宏分集传输系统可以实现更多的宏分集增益，从而大大提高了多用户宏分集传输的性能。

9. 发明申请

US20100290370A1 METHOD AND APPARATUS FOR SCHEDULING RESOURCES BETWEEN DIFFERENT TDD SYSTEMS 审中-公开
标题翻译：用于调度不同TDD系统之间的资源的方法和装置
公开(公告)号：US20100290370A1
公开(公告)日：2010-11-18
申请号：US12741846
申请日：2007-11-07
申请人： Dong Li , Liyu Cai , Hongwei Yang
发明人： Dong Li , Liyu Cai , Hongwei Yang
IPC分类号： H04W72/04
CPC分类号： H04B7/2656 , H04L5/0007 , H04L5/0037 , H04L5/14 , H04L5/143 , H04W72/044 , H04W72/12
摘要： A method and an apparatus for scheduling resources between a first TDD system and a second TDD system are disclosed, frames required for transmission by the first TDD system including a preamble sequence, an up-link subframe and a down-link subframe, the method comprises steps of allocating time and frequency resources for the first TDD system and the second TDD system based on service parameters of the first TDD system and service parameters of the second TDD system, and mapping the coded modulation data stream of the first TDD system and the second TDD system onto corresponding allocated time and frequency resources. According to the method and apparatus of the present invention, not only the latency of the traffic service, control signaling and the feedback transmission over the air interface can be reduced, but the compatibility requirement for existing system can also be reached. Moreover, resource allocation can be performed between different systems based on respective service loads.
摘要翻译：公开了一种用于在第一TDD系统和第二TDD系统之间调度资源的方法和装置，所述方法包括前导码序列，上行链路子帧和下行链路子帧的第一TDD系统的传输所需的帧，该方法包括基于第一TDD系统的服务参数和第二TDD系统的服务参数为第一TDD系统和第二TDD系统分配时间和频率资源的步骤，以及映射第一TDD系统和第二TDD系统的编码调制数据流 TDD系统对应分配的时间和频率资源。根据本发明的方法和装置，不仅可以减少业务业务的等待时间，控制信令和空中接口的反馈传输，还可以达到现有系统的兼容性要求。此外，可以基于相应的服务负载在不同系统之间执行资源分配。

10. 发明授权

US07606195B2 Method and device for dynamically scheduling radio resources of streaming media services 有权
标题翻译：动态调度流媒体业务无线电资源的方法和装置
公开(公告)号：US07606195B2
公开(公告)日：2009-10-20
申请号：US11262602
申请日：2005-11-01
申请人： Yang Wang , Liyu Cai
发明人： Yang Wang , Liyu Cai
IPC分类号： H04B7/212 , H04W4/00 , H04J3/00 , H04W72/00
CPC分类号： H04W72/1231 , H04L1/0003 , H04W72/1252
摘要： The invention discloses a radio resources scheduling method for dynamically scheduling the radio resources of streaming media services in a multi-carrier radio communication system including multiple sub-carriers, the method comprising steps of: obtaining from a physical layer the information of the quality of radio channel on each sub-carrier for each user. The method further comprises: obtaining from a cache layer the play time information which indicates how long the data remained in the cache of receiving terminal of each user will be played continuously; and selecting in turn the users and sub-carriers corresponding to the maximums of an evaluating function based on the evaluating function obtained by a linear combination of the information of the quality of radio channel and the reciprocal of the play time information of the residual data and allocating the users to the corresponding sub-carriers.
摘要翻译：本发明公开了一种用于在包括多个子载波的多载波无线电通信系统中动态调度流媒体业务的无线电资源的无线电资源调度方法，所述方法包括以下步骤：从物理层获取无线电质量信息每个用户的子载体上的通道。该方法还包括：从高速缓存层获取播放时间信息，该播放时间信息指示数据保留在每个用户的接收终端的高速缓存中将持续多长时间; 以及基于通过无线电信道质量的信息的线性组合和剩余数据的播放时间信息的倒数获得的评估函数，依次选择与评估函数的最大值相对应的用户和子载波，以及将用户分配给相应的子载波。

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