公开(公告)号：US09049722B2

公开(公告)日：2015-06-02

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： H04W36/00 ,  H04W72/04 ,  H04B7/06 ,  H04W52/34 ,  H04B7/04

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进行切换，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：US08838109B2

公开(公告)日：2014-09-16

申请号：US13275138

申请日：2011-10-17

申请人： Pablo A Anigstein ,  Junyi Li ,  Murari Srinivasan ,  Rajiv Laroia

发明人： Pablo A Anigstein ,  Junyi Li ,  Murari Srinivasan ,  Rajiv Laroia

IPC分类号： H04W36/00 ,  H04W36/06

CPC分类号： H04W36/06

摘要： Systems and methodologies are described that facilitate handing off from a first sector to a second sector. An established link to the first sector may be employed to communicate with the second sector. A handoff request from a wireless terminal to the second sector and an associated handoff response from the second sector to the wireless terminal may both traverse the first sector.

摘要翻译： 描述了有助于将第一扇区切换到第二扇区的系统和方法。 可以使用与第一部门的已建立的链接来与第二部门通信。 从无线终端到第二扇区的切换请求以及从第二扇区到无线终端的相关切换响应都可以遍历第一扇区。

公开(公告)号：US08582536B2

公开(公告)日：2013-11-12

申请号：US12630130

申请日：2009-12-03

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： H04W4/00

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.

公开(公告)号：US20120034921A1

公开(公告)日：2012-02-09

申请号：US13275138

申请日：2011-10-17

申请人： Pablo Anigstein ,  Junyi Li ,  Murari Srinivasan ,  Rajiv Laroia

发明人： Pablo Anigstein ,  Junyi Li ,  Murari Srinivasan ,  Rajiv Laroia

IPC分类号： H04W36/18

CPC分类号： H04W36/06

摘要： Systems and methodologies are described that facilitate handing off from a first sector to a second sector. An established link to the first sector may be employed to communicate with the second sector. A handoff request from a wireless terminal to the second sector and an associated handoff response from the second sector to the wireless terminal may both traverse the first sector.

摘要翻译： 描述了有助于将第一扇区切换到第二扇区的系统和方法。 可以使用与第一部门的已建立的链接来与第二部门通信。 从无线终端到第二扇区的切换请求以及从第二扇区到无线终端的相关切换响应都可以遍历第一扇区。

公开(公告)号：US07411895B2

公开(公告)日：2008-08-12

申请号：US10782186

申请日：2004-02-19

申请人： Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

发明人： Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

IPC分类号： H04J11/00

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. Superpostion 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。 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根据本发明的超扩频编码，例如，使用相同频率同时发射。 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，信道段到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）的一个或多个无线终端控制，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：US07039370B2

公开(公告)日：2006-05-02

申请号：US10964885

申请日：2004-10-14

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： H04B7/02

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.

公开(公告)号：US08571493B2

公开(公告)日：2013-10-29

申请号：US12606079

申请日：2009-10-26

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.

公开(公告)号：US08553595B2

公开(公告)日：2013-10-08

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射。 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：US08503938B2

公开(公告)日：2013-08-06

申请号：US11487017

申请日：2006-07-14

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

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

IPC分类号： H04B15/00

CPC分类号： H04W24/08 ,  H04B17/345 ,  H04B17/382 ,  H04W72/08

摘要： A wireless terminal receives and measures broadcast reference signals, e.g., beacon and/or pilot signals, transmitted from a plurality of base station attachment points. The wireless terminal monitors for and attempts to recover broadcast loading factor information corresponding to attachment points. The wireless terminal generates and transmits an interference report to a current attachment point, the report based on the results of a measured received reference signal from the current attachment point, a measured received reference signal from each of one or more different attachment points, and uplink loading factor information. In the absence of a successfully recovered broadcast uplink loading factor corresponding to an attachment point, the wireless terminal uses a default value for that loading factor. Generated interference reports are based on beacon signal measurements and uplink loading factors, pilot signal measurements and uplink loading factors, or a mixture of beacon and pilot signal measurements and uplink loading factors.

摘要翻译： 无线终端接收并测量从多个基站附接点发送的广播参考信号，例如信标和/或导频信号。 无线终端监视并尝试恢复对应于附接点的广播加载因子信息。 无线终端根据来自当前附着点的测定的接收到的参考信号的结果，来自一个或多个不同的附接点的每一个的测量的接收参考信号以及上行链路 加载因子信息。 在没有对应于附接点的成功恢复的广播上行链路负载因子的情况下，无线终端使用该负载因子的默认值。 生成的干扰报告基于信标信号测量和上行链路负载因子，导频信号测量和上行链路负载因子，或信标和导频信号测量和上行链路负载因子的混合。

公开(公告)号：US08190163B2

公开(公告)日：2012-05-29

申请号：US10640718

申请日：2003-08-13

申请人： Rajiv Laroia ,  Murari Srinivasan ,  Junyi Li

发明人： Rajiv Laroia ,  Murari Srinivasan ,  Junyi Li

IPC分类号： H04W72/00 ,  H04W4/00 ,  H04B7/00 ,  H04K1/10 ,  H04L5/12 ,  H04J7/00

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

摘要： Efficient coding and communication is accomplished by transmitting first and second sets of information using a relatively large transmission block including a plurality of minimum transmission units (MTUs), each MTU corresponding to a unique combination of resources. A first set of MTUs is used in conveying the first set of information, the first set including at least a majority of the MTUs in the transmission block. A second set of the MTUs is defined, e.g., selected, for use in conveying the second set of information, the second set of MTUs including less MTUs than the first set and at least some MTUs included in the first set. The first and second sets of information are communicated by transmitting at least some MTUs included in the first and the second sets of MTUs with the corresponding information modulated thereon.

摘要翻译： 通过使用包括多个最小传输单元（MTU）的相对大的传输块来传输第一和第二组信息来实现有效的编码和通信，每个MTU对应于资源的唯一组合。 第一组MTU用于传送第一组信息，第一组包括传输块中的至少大部分MTU。 第二组MTU被定义为例如被选择用于传送第二组信息，第二组MTU包括比第一组更少的MTU和包括在第一组中的至少一些MTU。 第一和第二组信息通过发送包括在第一和第二组MTU中的至少一些MTU与其上调制的相应信息进行通信。