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1. 发明授权

US09144076B2 User pairing and resource allocation for downlink multiuser multi-input-multi-output in long term evolution advanced systems 有权
标题翻译：用户配对和资源分配用于下行多用户多输入多输出的长期演进高级系统
公开(公告)号：US09144076B2
公开(公告)日：2015-09-22
申请号：US13622012
申请日：2012-09-18
申请人： Guosen Yue , Narayan Prasad , Sampath Rangarajan
发明人： Guosen Yue , Narayan Prasad , Sampath Rangarajan
IPC分类号： H04W4/00 , H04W72/06 , H04L5/00 , H04L27/26
CPC分类号： H04W72/06 , H04L5/0037 , H04L27/2601
摘要： A method for user pairing and resource allocation, includes performing a multiuser multi-input-multi-output (MU-MIMO) user pairing process to maximize an objective metric without common rank restriction; performing a rank balancing process to determine a uniform transmission user rank along all allocated resource blocks for each user; and with the uniform transmission user rank fixed for all the users, determining optimal user pairing and allocation for each of the resource blocks for each user.
摘要翻译：一种用于用户配对和资源分配的方法，包括执行多用户多输入多输出（MU-MIMO）用户配对过程以最大化不具有共同秩限制的客观量度; 执行秩平衡处理以确定针对每个用户的所有分配的资源块的均匀传输用户等级; 并且针对所有用户固定均匀传输用户等级，为每个用户确定每个资源块的最佳用户配对和分配。

2. 发明授权

US08891391B2 Resource allocation in mimo multi-cellular networks via submodular optimization 有权
标题翻译：通过子模块优化在mimo多蜂窝网络中的资源分配
公开(公告)号：US08891391B2
公开(公告)日：2014-11-18
申请号：US13459058
申请日：2012-04-27
申请人： Narayan Prasad , Honghai Zhang , Luca Venturino , Jubin Jose , Sampath Rangarajan
发明人： Narayan Prasad , Honghai Zhang , Luca Venturino , Jubin Jose , Sampath Rangarajan
IPC分类号： H04W72/00 , H04L5/00 , H04L12/24 , H04W72/04 , H04W28/04 , H04W72/08
CPC分类号： H04W72/0446 , H04L5/0035 , H04L5/0073 , H04W28/04 , H04W72/082
摘要： A method to allocate resources in a wireless MIMO system, by enforcing per-cell orthogonality to avoid intra-cell interference; and allocating resources based on interference handling.
摘要翻译：一种在无线MIMO系统中分配资源的方法，通过实施每小区正交性以避免小区内干扰; 并基于干扰处理分配资源。

3. 发明授权

US08761129B2 Enhancement of download multi-user multiple-input multiple-output wireless communications 有权
标题翻译：增强下载多用户多输入多输出无线通信
公开(公告)号：US08761129B2
公开(公告)日：2014-06-24
申请号：US13456845
申请日：2012-04-26
申请人： Narayan Prasad , Guosen Yue , Meilong Jiang , Mohammad A. Khojastepour , Sampath Rangarajan
发明人： Narayan Prasad , Guosen Yue , Meilong Jiang , Mohammad A. Khojastepour , Sampath Rangarajan
IPC分类号： H04B7/216
CPC分类号： H04W24/10 , H04B7/0417 , H04B7/0452 , H04B7/0469 , H04B7/0486 , H04B7/0626 , H04B7/063 , H04B7/065
摘要： A method implemented in a user equipment configured to be used in a multi-user (MU) multiple-input multiple-output (MIMO) wireless communications system is disclosed. In an aspect, the user equipment transmits to a base station a first channel state information (CSI) report determined according to a single-user (SU) MIMO rule and a second CSI report based on a residual error.
摘要翻译：公开了一种在配置成在多用户（MU）多输入多输出（MIMO）无线通信系统中使用的用户设备中实现的方法。一方面，用户设备向基站发送根据单用户（SU）MIMO规则确定的第一信道状态信息（CSI）报告和基于残差的第二CSI报告。

4. 发明授权

US08660077B2 Method and systems for conveying scheduling information of overlapping co-scheduled users in an OFDMA-MU-MIMO system 有权
标题翻译：用于在OFDMA-MU-MIMO系统中传送重叠共同调度用户的调度信息的方法和系统
公开(公告)号：US08660077B2
公开(公告)日：2014-02-25
申请号：US13296394
申请日：2011-11-15
申请人： Narayan Prasad , Mohammad Ali Khojastepour , Meilong Jiang , Xiaodong Wang , Sampath Rangarajan
发明人： Narayan Prasad , Mohammad Ali Khojastepour , Meilong Jiang , Xiaodong Wang , Sampath Rangarajan
IPC分类号： H04W4/00 , H04W28/04 , H04W72/04
CPC分类号： H04W72/04 , H04B7/0452 , H04B7/0639 , H04B7/066 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L1/0026 , H04L1/20 , H04L5/0007 , H04L25/0208 , H04W8/26 , H04W28/04 , H04W52/346 , H04W72/0446 , H04W72/12 , H04W72/1231 , H04W72/1289
摘要： Methods and systems for conveying or transmitting to any given user in an OFDMA-MU-MIMO system scheduling information of other co-scheduled users to permit the user to perform error-correction on received data and/or interference reduction on its received signals. The scheduling information can include resource block assignment, modulation constellations employed, coding rates employed, power levels utilized and precoder matrix indices used. Further, the scheduling information can be conveyed in part through dedicated reference symbol layers or pilot streams. Moreover, a base station may transmit a preliminary estimate of the total number of users the base station expects to schedule, or an upper-bound on the total number of users, to the MU-MIMO users to permit the MU-MIMO users to determine preferred precoder matrix indices and indications of channel quality indices.
摘要翻译：在OFDMA-MU-MIMO系统中向任何给定用户传送或发送给其他协调调度用户的信息的方法和系统，以允许用户对接收到的数据执行纠错和/或对其接收信号的干扰减少。调度信息可以包括资源块分配，采用的调制星座，采用的编码率，使用的功率电平和使用的预编码器矩阵索引。此外，可以部分地通过专用参考符号层或导频流来传送调度信息。此外，基站可以向MU-MIMO用户发送基站期望调度的用户总数或总用户数的上限的初步估计，以允许MU-MIMO用户确定优选的预编码器矩阵索引和信道质量指标的指示。

5. 发明授权

US08611917B2 LTE and LTE-advanced UL power control 有权
标题翻译： LTE和LTE高级UL功率控制
公开(公告)号：US08611917B2
公开(公告)日：2013-12-17
申请号：US13617766
申请日：2012-09-14
申请人： Honghai Zhang , Narayan Prasad , Sampath Rangarajan
发明人： Honghai Zhang , Narayan Prasad , Sampath Rangarajan
IPC分类号： H04W72/00
CPC分类号： H04W52/146 , H04W52/08 , H04W52/10 , H04W52/242 , H04W52/243
摘要： A method for LTE and LTE-A uplink power control includes open loop power control where user equipment UE measures downlink pathloss which is sent to an eNodeB that determines uplink UL transmit power based on the downlink pathloss.
摘要翻译：用于LTE和LTE-A上行链路功率控制的方法包括开环功率控制，其中用户设备UE基于下行链路路径损耗测量发送到确定上行链路UL发射功率的eNodeB的下行链路路径损耗。

6. 发明授权

US08532051B2 Method and systems for conveying scheduling information of overlapping co-scheduled users in an OFDMA-MU-MIMO system 有权
标题翻译：用于在OFDMA-MU-MIMO系统中传送重叠共同调度用户的调度信息的方法和系统
公开(公告)号：US08532051B2
公开(公告)日：2013-09-10
申请号：US13296387
申请日：2011-11-15
申请人： Narayan Prasad , Mohammad Ali Khojastepour , Meilong Jiang , Xiaodong Wang , Sampath Rangarajan
发明人： Narayan Prasad , Mohammad Ali Khojastepour , Meilong Jiang , Xiaodong Wang , Sampath Rangarajan
IPC分类号： H04L5/22 , H04W72/04 , H04L5/00
CPC分类号： H04W72/04 , H04B7/0452 , H04B7/0639 , H04B7/066 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L1/0026 , H04L1/20 , H04L5/0007 , H04L25/0208 , H04W8/26 , H04W28/04 , H04W52/346 , H04W72/0446 , H04W72/12 , H04W72/1231 , H04W72/1289
摘要： Methods and systems for conveying or transmitting to any given user in an OFDMA-MU-MIMO system scheduling information of other co-scheduled users to permit the user to perform error-correction on received data and/or interference reduction on its received signals. The scheduling information can include resource block assignment, modulation constellations employed, coding rates employed, power levels utilized and precoder matrix indices used. Further, the scheduling information can be conveyed in part through dedicated reference symbol layers or pilot streams. Moreover, a base station may transmit a preliminary estimate of the total number of users the base station expects to schedule, or an upper-bound on the total number of users, to the MU-MIMO users to permit the MU-MIMO users to determine preferred precoder matrix indices and indications of channel quality indices.
摘要翻译：在OFDMA-MU-MIMO系统中向任何给定用户传送或发送给其他协调调度用户的信息的方法和系统，以允许用户对接收到的数据执行纠错和/或对其接收信号的干扰减少。调度信息可以包括资源块分配，采用的调制星座，采用的编码率，使用的功率电平和使用的预编码器矩阵索引。此外，可以部分地通过专用参考符号层或导频流来传送调度信息。此外，基站可以向MU-MIMO用户发送基站期望调度的用户总数或总用户数的上限的初步估计，以允许MU-MIMO用户确定优选的预编码器矩阵索引和信道质量指标的指示。

7. 发明授权

US08521173B2 Methods and systems for dynamic and configuration based fractional frequency reuse for uneven load distributions 有权
$Methods and systems for dynamic and configuration based fractional frequency reuse for uneven load distributions$
标题翻译：用于不均匀载荷分布的基于动态和配置的分数频率复用的方法和系统
公开(公告)号：US08521173B2
公开(公告)日：2013-08-27
申请号：US12722761
申请日：2010-03-12
申请人： Honghai Zhang , Narayan Prasad , Sampath Rangarajan
发明人： Honghai Zhang , Narayan Prasad , Sampath Rangarajan
IPC分类号： H04W40/00
CPC分类号： H04W72/0453 , H04B17/0085 , H04B17/0087 , H04B17/345 , H04B17/382 , H04W16/02 , H04W16/10
摘要： Fractional frequency reuse systems and methods for assigning physical resource units of an available frequency band to sectors of cells are disclosed. In particular, the systems and methods permit adaptation of frequency configuration partitions to mobile station or throughput distribution within cells while at the same time ensuring mitigation of interference between neighboring sectors of different cells.
摘要翻译：公开了用于将可用频带的物理资源单元分配给小区扇区的分数频率重用系统和方法。特别地，系统和方法允许将频率配置分区适配到移动站或小区内的吞吐量分布，同时确保减轻不同小区的相邻扇区之间的干扰。

8. 发明授权

US08510433B2 Beam combination methods and systems for adapting communication links to varying channel conditions 有权
标题翻译：光束组合方法和系统，用于使通信链路适应不同的信道条件
公开(公告)号：US08510433B2
公开(公告)日：2013-08-13
申请号：US12941546
申请日：2010-11-08
申请人： Kishore Ramachandran , Narayan Prasad , Sampath Rangarajan
发明人： Kishore Ramachandran , Narayan Prasad , Sampath Rangarajan
IPC分类号： G06F15/16
CPC分类号： H04B7/0408 , H04B1/1027 , H04B7/063 , H04B7/0695 , H04B7/088
摘要： Methods and systems for rectifying deteriorated channel conditions on a communication link are described. In response to the detection of a link deterioration event, a cluster of beams about a currently utilized beam pair can be trialed to determine a suitable, alternate pair of beams on which to establish a communication link. In turn, in the case of a link blockage event, a set of beams having a relatively large azimuthal angle with respect to a currently utilized beam pair can be trialed to determine a suitable beam pair for further communication.
摘要翻译：描述了用于整流通信链路恶化的信道条件的方法和系统。响应于链路劣化事件的检测，可以尝试关于当前使用的波束对的一束波束，以确定在其上建立通信链路的合适的一对波束。反过来，在链路阻塞事件的情况下，可以对相对于当前利用的波束对具有相对大的方位角的一组波束进行试验，以确定用于进一步通信的合适的波束对。

9. 发明授权

US08374562B2 Codebook with nested structure 有权
标题翻译：嵌套结构的代码本
公开(公告)号：US08374562B2
公开(公告)日：2013-02-12
申请号：US13524269
申请日：2012-06-15
申请人： Mohammad Ali Khojastepour , Narayan Prasad
发明人： Mohammad Ali Khojastepour , Narayan Prasad
IPC分类号： H04B1/04
CPC分类号： H04B7/0617 , H04B7/0456 , H04B7/0632 , H04B7/0639
摘要： A multi-rank beamforming (MRBF) scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the MRBF transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices having a recursive structure which allows for efficient computation of the optimal precoding matrix and corresponding Signal to Interference and Noise Ratio (SINR). The codebook also enjoys a small storage footprint. Due to the computational efficiency and modest memory requirements, the optimal precoding determination can be made at user equipment (UE) and communicated to a transmitting base station over a limited uplink channel for implementation over the downlink channel.
摘要翻译：相应地确定其中估计下行链路信道并由MRBF发射机使用的最佳预编码矩阵的多级波束成形（MRBF）方案。从具有递归结构的矩阵码本中选择最佳预编码矩阵，其允许有效计算最佳预编码矩阵和对应的信号与干扰和噪声比（SINR）。该码本还具有小的存储空间。由于计算效率和适度的存储器要求，可以在用户设备（UE）进行最佳预编码确定，并通过有限的上行链路信道传送到发射基站，以通过下行链路信道实现。

10. 发明申请

US20120275402A1 RESOURCE ALLOCATION IN MIMO MULTI-CELLULAR NETWORKS VIA SUBMODULAR OPTIMIZATION 有权
标题翻译： MIMO多单元网络中的资源分配通过子模型优化
公开(公告)号：US20120275402A1
公开(公告)日：2012-11-01
申请号：US13459058
申请日：2012-04-27
申请人： Narayan Prasad , Honghai Zhang , Luca Venturino , Jubin Jose , Sampath Rangarajan
发明人： Narayan Prasad , Honghai Zhang , Luca Venturino , Jubin Jose , Sampath Rangarajan
IPC分类号： H04W72/04 , H04B15/00
CPC分类号： H04W72/0446 , H04L5/0035 , H04L5/0073 , H04W28/04 , H04W72/082
摘要： A method to allocate resources in a wireless MIMO system, by enforcing per-cell orthogonality to avoid intra-cell interference; and allocating resources based on interference handling.
摘要翻译：一种在无线MIMO系统中分配资源的方法，通过实施每小区正交性以避免小区内干扰; 并基于干扰处理分配资源。

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