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公开(公告)号：US08726115B2
公开(公告)日：2014-05-13
申请号：US12917556
申请日：2010-11-02
申请人： Kevin Power , Mythri Hunukumbure , Rajni Agarwal
发明人： Kevin Power , Mythri Hunukumbure , Rajni Agarwal
IPC分类号： G06F11/00
CPC分类号： H04L1/18
摘要： A method in a wireless communication system that includes a user equipment, an anchor network station and at least one assisting network station, where the user equipment transmits the same data to the network stations and the network stations each transmit an acknowledgement of the data to the user equipment in response. The at least one assisting network station also forwards the data to the anchor network station.
摘要翻译： 一种无线通信系统中的方法，其包括用户设备，锚网络站和至少一个辅助网络站，其中用户设备向网络站发送相同的数据，并且网络站各自将数据的确认发送到 用户设备响应。 至少一个辅助网络站还将数据转发到锚网络站。
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公开(公告)号：US08305942B2
公开(公告)日：2012-11-06
申请号：US12134643
申请日：2008-06-06
IPC分类号： H04J1/00
CPC分类号： H04L25/0204 , H04L5/0023 , H04L25/0222 , H04L25/03891
摘要： Closed loop MIMO FDD schemes can offer significant performance gains for OFDM based wireless communication systems over open loop MIMO schemes. However, the pre-coding weights (eigenvectors) on each of the frequency bands need to be updated and this adds extra overhead. The number of adjacent frequency fingers which can use the same pre-coding weights is governed by the coherence bandwidth of the eigen spatial modes. The receiver uses the average r.m.s. delay spread of the SISO channels as an indicator to the eigen coherence bandwidth, rather than explicitly calculating the eigen coherence bandwidth itself. This technique can be applied to TDD schemes as well, where the channel estimation is done with the reverse link, eliminating the need for feedback. The TDD transmitter can estimate the eigen coherence bandwidth on the basis of average r.m.s. delay spread, which saves computational effort.
摘要翻译： 闭环MIMO FDD方案可以通过开环MIMO方案为基于OFDM的无线通信系统提供显着的性能增益。 然而，每个频带上的预编码权重（特征向量）需要更新，这增加额外的开销。 可以使用相同的预编码权重的相邻频率指的数量由本征空间模式的相干带宽决定。 接收机使用平均r.m.s. SISO信道的延迟扩展作为本征相干带宽的指标，而不是明确计算本征相干带宽本身。 该技术也可以应用于TDD方案，其中通过反向链路进行信道估计，消除了对反馈的需要。 TDD发射机可以基于平均频率估计特征相干带宽。 延迟传播，节省了计算量。
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公开(公告)号：US20090225687A1
公开(公告)日：2009-09-10
申请号：US12134643
申请日：2008-06-06
CPC分类号： H04L25/0204 , H04L5/0023 , H04L25/0222 , H04L25/03891
摘要： Closed loop MIMO FDD schemes can offer significant performance gains for OFDM based wireless communication systems over open loop MIMO schemes. However, the pre-coding weights (eigenvectors) on each of the frequency bands need to be updated and this adds extra overhead. The number of adjacent frequency fingers which can use the same pre-coding weights is governed by the coherence bandwidth of the eigen spatial modes. The receiver uses the average r.m.s. delay spread of the SISO channels as an indicator to the eigen coherence bandwidth, rather than explicitly calculating the eigen coherence bandwidth itself. This technique can be applied to TDD schemes as well, where the channel estimation is done with the reverse link, eliminating the need for feedback. The TDD transmitter can estimate the eigen coherence bandwidth on the basis of average r.m.s. delay spread, which saves computational effort.
摘要翻译： 闭环MIMO FDD方案可以通过开环MIMO方案为基于OFDM的无线通信系统提供显着的性能增益。 然而，每个频带上的预编码权重（特征向量）需要更新，这增加额外的开销。 可以使用相同的预编码权重的相邻频率指的数量由本征空间模式的相干带宽决定。 接收机使用平均r.m.s. SISO信道的延迟扩展作为本征相干带宽的指标，而不是明确计算本征相干带宽本身。 该技术也可以应用于TDD方案，其中通过反向链路进行信道估计，消除了对反馈的需要。 TDD发射机可以基于平均频率估计特征相干带宽。 延迟传播，节省了计算量。
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公开(公告)号：US20130005385A1
公开(公告)日：2013-01-03
申请号：US13537409
申请日：2012-06-29
IPC分类号： H04W24/02
摘要： A value of a parameter which affects network performance or operation of a cell in a wireless network is re-selected by: storing an indicator, representing the performance and/or operation of the network, and a criterion to be met by the indicator when the value of the parameter has been re-selected; receiving data relating to the performance or operation of the network, and deriving therefrom statistical data relating to said indicator; storing that statistical data; when the value of the parameter is to be re-selected, obtaining at least two different solutions for the value of the parameter to be re-selected; using said statistical data to determine which of the solutions obtained most satisfactorily meets said criterion for the indicator; and selecting that solution for implementation on the network.
摘要翻译： 通过以下方式重新选择影响无线网络中的网络性能或小区的操作的参数的值：存储表示网络的性能和/或操作的指示符以及当指示符满足的标准时 已重新选择参数值; 接收与网络的性能或操作有关的数据，以及从其导出与所述指示符有关的统计数据; 存储该统计数据; 当要重新选择参数的值时，为要重新选择的参数的值获得至少两个不同的解; 使用所述统计数据来确定所获得的解决方案最令人满意地满足指示符的所述标准; 并选择该解决方案在网络上实现。
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公开(公告)号：US20120184280A1
公开(公告)日：2012-07-19
申请号：US13348099
申请日：2012-01-11
IPC分类号： H04W16/18
CPC分类号： H04W24/02
摘要： A method for use in providing coverage for at least part of a coverage hole in a first cell or cell sector in a cellular wireless network, in which method a second cell or cell sector is selected, from a group of cells or cell sectors in the cellular wireless network which neighbour the first cell or cell sector, to adapt its coverage so as to cover at least part of the coverage hole in the first cell or cell sector, the method including carrying out an identification process using data relating to a cell or cell sector in the group to identify a cell or cell sector suitable for selection as the second cell or cell sector, the identification process being carried out on one or more cells or cell sectors in the group in turn.
摘要翻译： 一种用于为蜂窝无线网络中的第一小区或小区扇区中的覆盖孔的至少一部分提供覆盖的方法，所述方法是从所述蜂窝无线网络中的小区或小区扇区组中选择第二小区或小区扇区 邻近第一小区或小区扇区的蜂窝无线网络，以适应其覆盖范围，以便覆盖第一小区或小区扇区中的覆盖孔的至少一部分，该方法包括使用与小区有关的数据或 组中的小区扇区以识别适合于选择的小区或小区扇区作为第二小区或小区扇区，所述识别过程依次在所述组中的一个或多个小区或小区扇区上执行。
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公开(公告)号：US08111709B2
公开(公告)日：2012-02-07
申请号：US12248081
申请日：2008-10-09
IPC分类号： H04J3/16
CPC分类号： H04B7/0413 , H04B7/0617 , H04B7/0686 , H04B7/0697 , H04B7/0854 , H04B7/0868
摘要： A wireless communication method in a MIMO OFDMA system in which users in each of multiple adjacent cells are served by a base station of the cell, the base station having a transmission link to each user in the cell on a respective MIMO channel. The method involves the base station (BSA) of a first cell carrying out the following steps: receiving, from a base station (BSB) or user (B) of another cell, one or more requests for reduction of interference which it is causing to users in that other cell; identifying a rank deficient MIMO channel (HA) among its transmission links to users in the first cell to select a MIMO channel to be made the subject of zero forcing; and applying zero forcing to transmissions on the selected MIMO channel (HA) to reduce interference experienced by at least one user (B) in the other cell. A rank deficient MIMO channel is chosen to minimize the reduction of overall data capacity due to the zero forcing; it is found by examining eigenvalues of the channel matrix and calculating ratios thereof. In addition, correlation between the selected channel (HA) and the channel (HB) to the user (B) in the other cell is checked and if they are correlated by more than a threshold amount, another channel in the first cell is selected instead.
摘要翻译： 一种MIMO OFDMA系统中的无线通信方法，其中，多个相邻小区中的每个小区中的用户由小区的基站服务，所述基站具有到相应MIMO信道上的小区中的每个用户的传输链路。 该方法涉及第一小区的基站（BSA），其执行以下步骤：从另一小区的基站（BSB）或用户（B）接收一个或多个减少其正在导致的干扰的请求 那个其他小区的用户; 识别其在第一小区中的用户的传输链路中的秩缺陷MIMO信道（HA），以选择要成为零强制的对象的MIMO信道; 以及对所选择的MIMO信道（HA）上的传输应用零强制，以减少另一个小区中至少一个用户（B）所经历的干扰。 选择等级不足的MIMO信道以最小化由于零强制引起的总体数据容量的减少; 通过检查信道矩阵的特征值及其计算比例可以发现。 此外，检查其他小区中所选择的信道（HA）和用户（B）的信道（HB）之间的相关性，并且如果它们被相关超过阈值量，则改为选择第一小区中的另一个信道 。
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公开(公告)号：US20100099450A1
公开(公告)日：2010-04-22
申请号：US12574344
申请日：2009-10-06
申请人： Yanling LU , Luciano SARPERI , Kevin POWER , Mythri HUNUKUMBURE
发明人： Yanling LU , Luciano SARPERI , Kevin POWER , Mythri HUNUKUMBURE
IPC分类号： H04B15/00
CPC分类号： H04W72/0406 , H04W72/082
摘要： An inter-cell interference mitigation signalling method for controlling the use of a plurality of inter-cell interference mitigation methods during wireless communications between a first wireless communications apparatus and a second wireless communications apparatus, the method comprising performing a system configuration procedure to select one or more of the inter-cell interference mitigation methods for use during the wireless communications between the first wireless communications apparatus and the second wireless communications apparatus; performing an initiation procedure to start the use of the one or more selected inter-cell interference mitigation methods in response to the meeting of the predetermined initiation criteria; and performing a termination procedure to end the use of the one or more selected inter-cell interference mitigation methods in response to the meeting of predetermined termination criteria.
摘要翻译： 一种小区间干扰减轻信令方法，用于在第一无线通信装置和第二无线通信装置之间的无线通信期间控制多个小区间干扰减轻方法的使用，所述方法包括执行系统配置过程以选择一个或 在第一无线通信装置和第二无线通信装置之间的无线通信期间使用更多的小区间干扰减轻方法; 响应于所述预定的启动准则的满足，执行启动过程以开始使用所述一个或多个选择的小区间干扰减轻方法; 以及响应于所述预定终止标准的满足，执行终止程序以终止所述一个或多个选择的小区间干扰减轻方法的使用。
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公开(公告)号：US20130225174A1
公开(公告)日：2013-08-29
申请号：US13814166
申请日：2010-08-04
IPC分类号： H04W36/22
摘要： A distributed load balancing method for use in a cell of a cellular wireless network, in which a first parameter of each cell participating in the method is indicative of the operational performance of the cell and has an optimum value, and in which a second parameter of each cell participating in the method is indicative of the degree of acceptance by the cell of user transfers to the cell relative to the degree of requests by the cell to transfer users from the cell and has an optimum value.
摘要翻译： 一种在蜂窝无线网络的小区中使用的分布式负载平衡方法，其中参与所述方法的每个小区的第一参数指示所述小区的操作性能并具有最佳值，并且其中第二参数 参与该方法的每个小区相对于小区从小区传送用户的请求的程度，指示小区对用户转移到小区的程度，并且具有最佳值。
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公开(公告)号：US20120307750A1
公开(公告)日：2012-12-06
申请号：US13472792
申请日：2012-05-16
IPC分类号： H04W72/04
摘要： The present invention relates to a method for controlling communication resources in a cellular communication network (1), the cellular communication network comprising a plurality of cells (A to Q) which are under the control of at least one base station (10) and which use the communication resources to communicate via communication links, wherein a distance between two neighbouring cells of the plurality of cells using a same communication resource is defined to be a re-use distance of said same communication resource.
摘要翻译： 本发明涉及一种用于控制蜂窝通信网络（1）中的通信资源的方法，所述蜂窝通信网络包括在至少一个基站（10）的控制下的多个小区（A至Q），以及哪个 使用通信资源通过通信链路进行通信，其中使用相同通信资源的多个小区中的两个相邻小区之间的距离被定义为所述相同通信资源的重用距离。
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公开(公告)号：US20120127876A1
公开(公告)日：2012-05-24
申请号：US13292807
申请日：2011-11-09
摘要： A cell edge coverage hole detection method for a cellular wireless communication system such as an LTE system. A coverage hole in a cell edge region will cause radio link failures, RLF, which are difficult to distinguish from those caused by handover issues. The method collects (S10) RLF reports along with related connectivity patterns and location reports, and identifies (S20) a drive route across a cell edge at which radio link failures are occurring. By correlating (S30) the measurement reports from users travelling in both directions along the route, it can be judged (S40) whether a pattern specific to a coverage hole can be identified, distinguishing coverage holes (S60) from radio link failure occurring as a result of handover failure (S50).
摘要翻译： 一种用于诸如LTE系统的蜂窝无线通信系统的小区边缘覆盖孔检测方法。 小区边缘区域中的覆盖孔将导致无线电链路故障，RLF难以与由切换问题引起的故障区分开来。 该方法收集（S10）RLF报告以及相关的连接模式和位置报告，并识别（S20）穿过发生无线电链路故障的小区边缘的驱动路由。 通过将沿着路线沿两个方向行进的用户的测量报告相关联（S30），可以判断（S40）是否可以识别特定于覆盖孔的模式，区分覆盖范围（S60）和无线链路故障 切换失败的结果（S50）。
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