公开(公告)号：US08514692B2

公开(公告)日：2013-08-20

申请号：US11251069

申请日：2005-10-14

申请人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Prashanth Hande

发明人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Prashanth Hande

IPC分类号： H04J11/00 ,  H04B1/00

CPC分类号： H04B1/7103 ,  H04B1/7097 ,  H04B7/022 ,  H04B17/24 ,  H04B17/318 ,  H04B17/345 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04L5/023

摘要： Methods and apparatus for collecting, measuring, reporting and/or using information which can be used for interference control purposes. Wireless terminals measure signals transmitted from one or more base stations, e.g., base station sector transmitters. The measured signals may be, e.g., beacon signals and/or pilot signals. From the measured signals, the wireless terminal generates one or more gain ratios which provide information about the relative gain of the communications channels from different base station sectors to the wireless terminal. This information represents interference information since it provides information about the signal interference that will be caused by transmissions from other base station sectors relative to transmissions made by the base station sector to which the wireless terminal is attached. Based on the signal energy measurements and relative gains generated from the energy measures, reports are generated in accordance with the invention and sent to one or more base stations.

摘要翻译： 用于收集，测量，报告和/或使用可用于干扰控制目的的信息的方法和装置。 无线终端测量从一个或多个基站（例如，基站扇区发射机）发射的信号。 所测量的信号可以是例如信标信号和/或导频信号。 从所测量的信号中，无线终端产生一个或多个增益比，其提供关于来自不同基站扇区到无线终端的通信信道的相对增益的信息。 该信息表示干扰信息，因为它提供了关于由来自其他基站扇区的相对于由无线终端所附接的基站扇区所做的传输而引起的信号干扰的信息。 基于从能量测量产生的信号能量测量和相对增益，根据本发明生成报告并发送到一个或多个基站。

公开(公告)号：US07630339B2

公开(公告)日：2009-12-08

申请号：US10763944

申请日：2004-01-23

申请人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan

发明人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan

IPC分类号： H04Q7/00

CPC分类号： H04B7/0626

摘要： Methods and apparatus for providing channel diversity to wireless terminals (WTs) in a manner that reduces the latency between the time a WT encounters satisfactory channel conditions are described. A plurality of communications channels with different physical characteristics are maintained in a cell by a base station (BS). Each WT monitors multiple channels and maintains multiple channel estimates at the same time so that rapid switching between channels is possible. Channel quality information is conveyed from each WT to the BS. The WT or BS selects a channel based on the measured channel quality. By supporting multiple channels and by introducing periodic variations into the channels in various embodiments, the time before a WT encounters a channel with good or acceptable channel conditions is minimized even if the WT does not change location. Multiple antennas are used at the BS to support numerous channels simultaneously, e.g., by controlling antenna patterns.

摘要翻译： 描述了以降低WT遇到令人满意的信道条件的时间之间的等待时间的方式向无线终端（WT）提供信道分集的方法和装置。 具有不同物理特性的多个通信信道由基站（BS）保持在小区中。 每个WT监视多个信道并同时维持多个信道估计，使得信道之间的快速切换是可能的。 信道质量信息从每个WT传送到BS。 WT或BS基于测量的信道质量来选择信道。 通过支持多个信道并且在各种实施例中引入周期性变化到信道中，即使WT不改变位置，WT遇到具有良好或可接受的信道条件的信道之前的时间被最小化。 在BS处使用多个天线来同时支持多个信道，例如通过控制天线方向图。

公开(公告)号：US07610024B2

公开(公告)日：2009-10-27

申请号：US11284285

申请日：2005-11-21

申请人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Frank A. Lane ,  Prashanth Hande

发明人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Frank A. Lane ,  Prashanth Hande

IPC分类号： H04B7/06

CPC分类号： H04B7/0604 ,  H01Q3/24 ,  H01Q3/2605 ,  H04B7/061 ,  H04B7/0691 ,  H04B7/0805 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/006 ,  H04W52/42

摘要： Transmit and/or receive diversity is achieved using multiple antennas. In some embodiments, a single transmitter chain within a wireless terminal is coupled over time to a plurality of transmit antennas. At any given time, a controllable switching module couples the single transmitter chain to one the plurality of transmit antennas. Over time, the switching module couples the output signals from the single transmitter chain to different transmit antennas. Switching decisions are based upon predetermined information, dwell information, and/or channel condition feedback information. Switching is performed on some dwell and/or channel estimation boundaries. In some OFDM embodiments, each of multiple transmitter chains is coupled respectively to a different transmit antenna. Information to be transmitted is mapped to a plurality of tones. Different subsets of tones are formed for and transmitted through different transmit chain/antenna sets simultaneously. The balance of tones allocated to the subsets for each antenna are changed as a function of predetermined information, dwell information, and/or channel condition feedback information.

摘要翻译： 使用多个天线实现发射和/或接收分集。 在一些实施例中，无线终端内的单个发射机链随时间耦合到多个发射天线。 在任何给定时间，可控开关模块将单个发射机链耦合到多个发射天线中的一个。 随着时间的推移，开关模块将来自单个发射机链的输出信号耦合到不同的发射天线。 切换决定基于预定信息，停留信息和/或信道条件反馈信息。 在一些驻留和/或信道估计边界上执行切换。 在一些OFDM实施例中，多个发射机链中的每一个分别耦合到不同的发射天线。 要发送的信息被映射到多个音调。 为不同的发射链/天线组同时形成和发送不同的音调子集。 分配给每个天线的子集的音调的平衡作为预定信息，停留信息和/或信道条件反馈信息的函数而改变。

公开(公告)号：US20070242639A1

公开(公告)日：2007-10-18

申请号：US11487260

申请日：2006-07-14

申请人： Alexander Leonidov ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

发明人： Alexander Leonidov ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

IPC分类号： H04B7/216

CPC分类号： H04L27/2608

摘要： Improved ways of communicating assignment signals using flash signaling are described, e.g., for wireless terminals with low SNR, that are more robust against large variation of channel gains due to e.g., frequency selective fading and fast fading in time. Coding and modulation methods and apparatus that have excellent properties against symbol erasures are described. The use of flash signaling provides an improved assignment channel having strong performance on the fading channel without compromising the performance on the AWGN channel. In one exemplary embodiment, the coding and modulation method can tolerate up to 5 erased symbols out of 8 transmitted symbols. One embodiment reduces or minimizes the sector interference on the flash assignment by improving or maximizing orthogonality between different sectors. In addition, one embodiment describes improved ways of swapping flash assignment tone-symbols in the presence other high priority signals, like sector pilots and sector null pilots.

摘要翻译： 例如，对于具有低SNR的无线终端，使用闪信号进行传送分配信号的改进方式对于由于例如频率选择性衰落和时间上的快速衰落而导致的信道增益的大变化更加鲁棒。 描述了具有针对符号擦除的优异特性的编码和调制方法和装置。 闪光信令的使用提供了在衰落信道上具有强性能的改进的分配信道，而不损害AWGN信道上的性能。 在一个示例性实施例中，编码和调制方法可以容忍8个发送的符号中多达5个擦除的符号。 一个实施例通过改善或最大化不同扇区之间的正交性来减少或最小化闪存分配上的扇区干扰。 此外，一个实施例描述了在存在其他高优先级信号（如扇区导频和扇区空导频）时交换闪存分配音调符号的改进方式。

公开(公告)号：US20070064641A1

公开(公告)日：2007-03-22

申请号：US11599837

申请日：2006-11-15

申请人： Rajiv Laroia ,  Murari Srinivasan ,  Junyi Li

发明人： Rajiv Laroia ,  Murari Srinivasan ,  Junyi Li

IPC分类号： H04B7/216

CPC分类号： H04W72/048 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0689 ,  H04B7/0695 ,  H04B17/24 ,  H04W52/346

摘要： Methods and apparatus for supporting and using multiple communications channels corresponding to different transmit technologies and/or access technologies in parallel within a cell of a wireless communications system are described. Mobile nodes support multiple technologies and can switch between the technology being used at a particular point in time, e.g., from a first channel corresponding to a first technology to a second channel corresponding to a different technology which provides better transmission characteristics, e.g., a better perceived channel quality. Mobiles maintain at least two sets of channel quality information at any one point in time. Mobiles select the better channel and communicate the channel selection to the base station or communicate channel quality information for multiple channels to the base station and allow the base station to select the channel corresponding to the technology providing the better conditions for the mobile. Different mobiles in the same cell may support different technologies.

摘要翻译： 描述了在无线通信系统的小区内并行地支持和使用对应于不同发射技术和/或接入技术的多个通信信道的方法和装置。 移动节点支持多种技术，并且可以在特定时间点使用的技术之间切换，例如，从对应于第一技术的第一信道到对应于提供更好传输特性的不同技术的第二信道，例如，更好的 感知渠道质量。 手机在任何一个时间点保持至少两组信道质量信息。 移动台选择更好的信道并将信道选择传送到基站，或者向基站传送用于多个信道的信道质量信息，并允许基站选择与为移动设备提供更好条件的技术相对应的信道。 同一小区内的不同手机可能支持不同的技术。

公开(公告)号：US20060099915A1

公开(公告)日：2006-05-11

申请号：US11284285

申请日：2005-11-21

申请人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Frank Lane ,  Prashanth Hande

发明人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Frank Lane ,  Prashanth Hande

IPC分类号： H04B7/00

CPC分类号： H04B7/0604 ,  H01Q3/24 ,  H01Q3/2605 ,  H04B7/061 ,  H04B7/0691 ,  H04B7/0805 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/006 ,  H04W52/42

摘要： Transmit and/or receive diversity is achieved using multiple antennas. In some embodiments, a single transmitter chain within a wireless terminal is coupled over time to a plurality of transmit antennas. At any given time, a controllable switching module couples the single transmitter chain to one the plurality of transmit antennas. Over time, the switching module couples the output signals from the single transmitter chain to different transmit antennas. Switching decisions are based upon predetermined information, dwell information, and/or channel condition feedback information. Switching is performed on some dwell and/or channel estimation boundaries. In some OFDM embodiments, each of multiple transmitter chains is coupled respectively to a different transmit antenna. Information to be transmitted is mapped to a plurality of tones. Different subsets of tones are formed for and transmitted through different transmit chain/antenna sets simultaneously. The balance of tones allocated to the subsets for each antenna are changed as a function of predetermined information, dwell information, and/or channel condition feedback information.

公开(公告)号：US20090296662A1

公开(公告)日：2009-12-03

申请号：US12188140

申请日：2008-08-07

申请人： Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

发明人： Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

IPC分类号： H04B7/216

CPC分类号： H04W52/283 ,  H04L1/1607 ,  H04L1/1861 ,  H04L5/04 ,  H04L27/2604 ,  H04L27/3488 ,  H04W52/24

摘要： Methods of using superposition coding in a communications systems, e.g., a multi-user communications system. Superposition coding in accordance with the invention occurs in the case of an uplink by transmissions of different wireless terminals transmitting using the same communications resource, e.g., simultaneously transmitting using the same frequencies. The signals combine in the communications channel resulting in one transmission being superimposed on the other transmission. The device, e.g., base station, receiving the superimposed signals uses superposition decoding techniques to recover both signals. To obtain the benefit of the superposition, assignments of channel segments to multiple wireless terminals is controlled by the base station and/or transmission power levels are controlled by on or more wireless terminals sharing the same uplink communications resource, e.g., time slot, to make sure that the received signals from the different devices will have different received power levels making superposition decoding possible.

摘要翻译： 在通信系统（例如，多用户通信系统）中使用叠加编码的方法。 根据本发明的叠加编码在通过使用相同通信资源发送的不同无线终端的传输的上行链路的情况下发生，例如，使用相同频率同时发送。 信号在通信信道中组合，导致一个传输被叠加在另一个传输上。 接收叠加信号的设备，例如基站使用叠加解码技术来恢复两个信号。 为了获得叠加的优点，信道段对多个无线终端的分配由基站控制，并且/或发射功率电平由共享相同上行链路通信资源（例如时隙）的多个无线终端控制，以使 确保来自不同设备的接收信号将具有不同的接收功率电平，从而使叠加解码成为可能。

公开(公告)号：US20050181799A1

公开(公告)日：2005-08-18

申请号：US10830976

申请日：2004-04-23

申请人： Rajiv Laroia ,  Murari Srinivasan ,  Junyi Li

发明人： Rajiv Laroia ,  Murari Srinivasan ,  Junyi Li

IPC分类号： H04B7/04 ,  H04B7/12 ,  H04W24/00 ,  H04W24/10 ,  H04W28/08 ,  H04W36/06 ,  H04W36/14 ,  H04W40/02 ,  H04W48/08 ,  H04W72/02 ,  H04W72/08 ,  H04W88/06 ,  H04Q7/20

CPC分类号： H04L5/0055 ,  H04B7/0452 ,  H04B7/0689 ,  H04B7/12 ,  H04B17/24 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/006 ,  H04W24/00 ,  H04W24/10 ,  H04W28/08 ,  H04W36/06 ,  H04W36/14 ,  H04W40/02 ,  H04W48/08 ,  H04W72/02 ,  H04W88/06 ,  Y02D70/142 ,  Y02D70/164 ,  Y02D70/30 ,  Y02D70/442 ,  Y02D70/444

摘要： Methods and apparatus for supporting and using multiple communications channels corresponding to different transmit technologies and/or access technologies in parallel within a cell of a wireless communications system are described. Mobile nodes support multiple technologies and can switch between the technology being used at a particular point in time, e.g., from a first channel corresponding to a first technology to a second channel corresponding to a different technology which provides better transmission characteristics, e.g., a better perceived channel quality. Mobiles maintain at least two sets of channel quality information at any one point in time. Mobiles select the better channel and communicate the channel selection to the base station or communicate channel quality information for multiple channels to the basestation and allow the base station to select the channel corresponding to the technology providing the better conditions for the mobile. Different mobiles in the same cell may support different technologies.

摘要翻译： 描述了在无线通信系统的小区内并行地支持和使用对应于不同发射技术和/或接入技术的多个通信信道的方法和装置。 移动节点支持多种技术，并且可以在特定时间点使用的技术之间切换，例如，从对应于第一技术的第一信道到对应于提供更好传输特性的不同技术的第二信道，例如，更好的 感知渠道质量。 手机在任何一个时间点保持至少两组信道质量信息。 移动台选择更好的信道并将信道选择传送到基站，或者将用于多个信道的信道质量信息传送到基站，并允许基站选择对应于该技术的信道，为移动设备提供更好的条件。 同一小区内的不同手机可能支持不同的技术。

公开(公告)号：US20050085197A1

公开(公告)日：2005-04-21

申请号：US10964885

申请日：2004-10-14

申请人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Frank Lane ,  Prashanth Hande

发明人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Frank Lane ,  Prashanth Hande

IPC分类号： H04B7/005 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04W52/42 ,  H04B1/02 ,  H03C7/02 ,  H04B7/02 ,  H04B7/10 ,  H04L1/02

CPC分类号： H04B7/0604 ,  H01Q3/24 ,  H01Q3/2605 ,  H04B7/061 ,  H04B7/0691 ,  H04B7/0805 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/006 ,  H04W52/42

摘要： Transmit and/or receive diversity is achieved using multiple antennas. In some embodiments, a single transmitter chain within a wireless terminal is coupled over time to a plurality of transmit antennas. At any given time, a controllable switching module couples the single transmitter chain to one the plurality of transmit antennas. Over time, the switching module couples the output signals from the single transmitter chain to different transmit antennas. Switching decisions are based upon predetermined information, dwell information, and/or channel condition feedback information. Switching is performed on some dwell and/or channel estimation boundaries. In some OFDM embodiments, each of multiple transmitter chains is coupled respectively to a different transmit antenna. Information to be transmitted is mapped to a plurality of tones. Different subsets of tones are formed for and transmitted through different transmit chain/antenna sets simultaneously. The balance of tones allocated to the subsets for each antenna are changed as a function of predetermined information, dwell information, and/or channel condition feedback information.

摘要翻译： 使用多个天线实现发射和/或接收分集。 在一些实施例中，无线终端内的单个发射机链随时间耦合到多个发射天线。 在任何给定时间，可控开关模块将单个发射机链耦合到多个发射天线中的一个。 随着时间的推移，开关模块将来自单个发射机链的输出信号耦合到不同的发射天线。 切换决定基于预定信息，停留信息和/或信道条件反馈信息。 在一些驻留和/或信道估计边界上执行切换。 在一些OFDM实施例中，多个发射机链中的每一个分别耦合到不同的发射天线。 要发送的信息被映射到多个音调。 为不同的发射链/天线组同时形成和发送不同的音调子集。 分配给每个天线的子集的音调的平衡作为预定信息，停留信息和/或信道条件反馈信息的函数而改变。

公开(公告)号：US20050003768A1

公开(公告)日：2005-01-06

申请号：US10763944

申请日：2004-01-23

申请人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan

发明人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan

IPC分类号： H04W88/18 ,  H04B7/06 ,  H03C7/02

CPC分类号： H04B7/0626

摘要： Methods and apparatus for providing channel diversity to wireless terminals (WTs) in a manner that reduces the latency between the time a WT encounters satisfactory channel conditions are described. A plurality of communications channels with different physical characteristics are maintained in a cell by a base station (BS). Each WT monitors multiple channels and maintains multiple channel estimates at the same time so that rapid switching between channels is possible. Channel quality information is conveyed from each WT to the BS. The WT or BS selects a channel based on the measured channel quality. By supporting multiple channels and by introducing periodic variations into the channels in various embodiments, the time before a WT encounters a channel with good or acceptable channel conditions is minimized even if the WT does not change location. Multiple antennas are used at the BS to support numerous channels simultaneously, e.g., by controlling antenna patterns.

摘要翻译： 描述了以降低WT遇到令人满意的信道条件的时间之间的等待时间的方式向无线终端（WT）提供信道分集的方法和装置。 具有不同物理特性的多个通信信道由基站（BS）保持在小区中。 每个WT监视多个信道并同时维持多个信道估计，使得信道之间的快速切换是可能的。 信道质量信息从每个WT传送到BS。 WT或BS基于测量的信道质量来选择信道。 通过支持多个信道并且通过在各种实施例中引入周期性变化到信道中，即使WT不改变位置，WT遇到具有良好或可接受的信道条件的信道之前的时间被最小化。 在BS处使用多个天线来同时支持多个信道，例如通过控制天线方向图。