公开(公告)号：US20090109851A1

公开(公告)日：2009-04-30

申请号：US11933042

申请日：2007-10-31

Applicant: Junyi Li ,  Rajiv Laroia ,  Sundeep Rangan ,  Thomas Richardson ,  Xinzhou Wu ,  Saurabh Tavildar

Inventor： Junyi Li ,  Rajiv Laroia ,  Sundeep Rangan ,  Thomas Richardson ,  Xinzhou Wu ,  Saurabh Tavildar

IPC: H04L12/28

CPC classification number: H04W72/1231 ,  H04W72/1278 ,  H04W84/18 ,  H04W92/18

Abstract: Methods and apparatus for use in a wireless communications system in which traffic air link resources may be, and sometimes are, shared are described. Various described methods and apparatus are well suited for use in a peer to peer communications system in which transmission control decisions are made in a decentralized manner. An exemplary peer to peer communications system implements the scheduling of traffic intervals in a distributed manner utilizing connection priority information and interference information. An exemplary peer to peer timing structure includes a user scheduling interval and an associated traffic interval. The user scheduling interval includes a plurality transmission request/request response rounds. By utilizing multiple request/request response rounds, a transmission decision corresponding to a connection to yield in an earlier round can be overridden in a subsequent round, resulting in higher overall traffic throughput in the system.

Abstract translation: 描述用于其中交通空中链路资源可以共享的无线通信系统中的方法和装置。 各种描述的方法和装置非常适合用于以分散方式进行传输控制决定的对等通信系统。 示例性的对等通信系统利用连接优先级信息和干扰信息以分布式方式实现业务间隔的调度。 一种示例性的对等定时结构包括用户调度间隔和相关联的业务间隔。 用户调度间隔包括多个发送请求/请求响应轮。 通过利用多个请求/请求响应轮，可以在随后的一轮中覆盖对应于在较早轮中产生的连接的传输决定，导致系统中更高的总体流量吞吐量。

公开(公告)号：US20080013521A1

公开(公告)日：2008-01-17

申请号：US11486540

申请日：2006-07-14

Applicant: Sundeep Rangan ,  Junyi Li

Inventor： Sundeep Rangan ,  Junyi Li

IPC: H04J3/06

CPC classification number: H04W56/0045 ,  H04L5/003 ,  H04L5/0078 ,  H04L5/0098

Abstract: The claimed subject matter relates to acquiring channel access in a wireless communication environment. A wireless terminal may transmit first and second sets of tones over respective first and second contiguous transmission periods. The first and second tone sets may be disjoint from each other and may each comprise a number of contiguous tones. The terminal may then refrain from transmitting during a third time period in order to receive a grant signal from a base station in response to the access request. The beginnings of the first time period and the second time period may be a function of a determined uplink transmission time.

Abstract translation: 所要求保护的主题涉及在无线通信环境中获取信道接入。 无线终端可以在相应的第一和第二连续传输周期上传送第一和第二组音调。 第一和第二音调集可以彼此不相交，并且可以各自包括多个连续的音调。 然后终端可以在第三时间段期间避免发送，以便响应于接入请求从基站接收授权信号。 第一时间段和第二时间段的开始可以是确定的上行链路传输时间的函数。

公开(公告)号：US20070066329A1

公开(公告)日：2007-03-22

申请号：US11229846

申请日：2005-09-19

Applicant: Rajiv Laroia ,  Pablo Anigstein ,  Arnab Das ,  Sundeep Rangan

Inventor： Rajiv Laroia ,  Pablo Anigstein ,  Arnab Das ,  Sundeep Rangan

IPC: H04B7/00 ,  H04B15/00

CPC classification number: H04W56/00 ,  H04B7/2678 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0053 ,  H04W52/0206 ,  H04W72/1278 ,  Y02D70/449

Abstract: A multi-mode base station includes a transmit standby mode and an active mode. Transmit standby mode of base station operation is a low power/low interference level of operation as compared to active mode. In transmit standby mode at least some of the synchronization signaling such as pilot tone signaling is reduced in power level and/or rate with respect to the active mode. In transmit standby mode, the base station has no active state registered wireless terminals being serviced but may have some sleep state registered wireless terminals being serviced. Mode transitions from active to transmit standby may be in response to: a detected period of inactivity, scheduling information, base station mode change signals, and/or detected wireless terminal state transition. Mode transitions from transmit standby to active may be in response to: scheduling information, access signals, wake-up signals, hand-off signals, wireless terminal state change signals, and/or base station mode change signals.

Abstract translation: 多模式基站包括发送待机模式和活动模式。 与主动模式相比，基站操作的发送待机模式是低功耗/低干扰电平。 在发送待机模式中，诸如导频音调信令的至少一些同步信令相对于活动模式降低功率电平和/或速率。 在发送待机模式中，基站没有被激活状态登记的无线终端被服务，但是可能有一些睡眠状态登记的无线终端被维护。 模式从有效切换到发送备用的转换可以是：检测到的不活动时段，调度信息，基站模式改变信号和/或检测到的无线终端状态转换。 从发射待机状态转换为有效的模式可以响应于：调度信息，接入信号，唤醒信号，切换信号，无线终端状态改变信号和/或基站模式改变信号。

公开(公告)号：US07039370B2

公开(公告)日：2006-05-02

申请号：US10964885

申请日：2004-10-14

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

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

IPC: H04B7/02

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

Abstract: 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：US20050238083A1

公开(公告)日：2005-10-27

申请号：US11168210

申请日：2005-06-27

Applicant: Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Pramod Viswanath

Inventor： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Pramod Viswanath

IPC: H04J11/00 ,  H04B1/7143 ,  H04B1/7156 ,  H04B7/26 ,  H04L5/02 ,  H04L27/26 ,  H04B1/713

CPC classification number: H04B1/7143 ,  H04B1/7156 ,  H04B2001/71563 ,  H04L5/0019 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2675

Abstract: A base station having the strongest downlink signal is identified by utilizing a unique slope of a pilot tone hopping sequence being transmitted by a base station. Specifically, base station identification is realized by determining the slope of the strongest received pilot signal, i.e., the received pilot signal having the maximum energy. In an embodiment of the invention, the pilot tone hopping sequence is based on a Latin Squares sequence. With a Latin Squares based pilot tone hopping sequence, all a mobile user unit needs is to locate the frequency of the pilot tones at one time because the pilot tone locations at subsequent times can be determined from the slope of the Latin Squares pilot tone hopping sequence. The slope and initial frequency shift of the pilot tone hopping sequence with the strongest received power is determined by employing a unique maximum energy detector. In one embodiment, the slope and initial frequency shift of the pilot signal having the strongest received power is determined by finding the slope and initial frequency shift of a predicted set of pilot tone locations having the maximum received energy. In another embodiment, the frequency shift of the pilot signal with the strongest, i.e., maximum, received power is estimated at each of times “t”. These frequency shifts are employed in accordance with a prescribed relationship to determine the unknown slope and the initial frequency shift of the pilot signal.

Abstract translation: 通过利用由基站发送的导频音跳频序列的唯一斜率，来识别具有最强下行链路信号的基站。 具体地，通过确定最强接收导频信号的斜率，即具有最大能量的接收导频信号来实现基站识别。 在本发明的实施例中，导频音跳频序列基于拉丁方阵序列。 利用基于拉丁方阵的导频音跳频序列，移动用户单元需要的是一次定位导频音频的频率，因为可以从拉丁方正导频音跳频序列的斜率确定随后时间的导频音位置 。 具有最强接收功率的导频音跳频序列的斜率和初始频移通过采用独特的最大能量检测器来确定。 在一个实施例中，具有最大接收功率的导频信号的斜率和初始频移通过找到具有最大接收能量的预测导频音位置集合的斜率和初始频移来确定。 在另一个实施例中，在每个时间“t”处估计具有最强，即最大接收功率的导频信号的频移。 根据规定的关系采用这些频移来确定导频信号的未知斜率和初始频移。

公开(公告)号：US20050036441A1

公开(公告)日：2005-02-17

申请号：US10641308

申请日：2003-08-13

Applicant: Rajiv Laroia ,  Junyi Li ,  John Fan ,  Sundeep Rangan ,  Prashanth Hande

Inventor： Rajiv Laroia ,  Junyi Li ,  John Fan ,  Sundeep Rangan ,  Prashanth Hande

IPC: H04B7/00 ,  H04B7/005 ,  H04J11/00 ,  H04L27/26 ,  H04L27/36

CPC classification number: H04W52/08 ,  H04L27/2608 ,  H04L27/362 ,  H04W52/56 ,  H04W52/60

Abstract: The present invention involves apparatus and methods to perform wireless terminal transmission power control. The invention uses novel and highly efficient methods to: convey power control information, specify power control level adjustments, recognize power control information, limit interference in the power control signaling, and recognize corrupted power control signaling, thus conserving wireless terminal energy and minimizing power control signaling and associated bandwidth. Base stations send analog power control command signals, with a continuous range of control levels, to wireless terminals for transmission power adjustments. Power control signals include two components which can be used to convey information, e.g., power control commands, signal quality, device identity information. For zero power adjustment, the control component signal is not transmitted. For a non-zero adjustment, power control signals are sent using control ranges and limits, known to the base station and wireless terminal, with the scaling adjusted or synchronized based upon feedback information.

Abstract translation: 本发明涉及执行无线终端传输功率控制的装置和方法。 本发明使用新颖且高效的方法：传送功率控制信息，指定功率控制电平调整，识别功率控制信息，限制功率控制信令中的干扰，并识别损坏的功率控制信令，从而节省无线终端能量并最小化功率控制 信令和相关带宽。 基站向无线终端发送模拟功率控制命令信号，具有连续的控制级别，用于传输功率调整。 功率控制信号包括可用于传送信息的两个组件，例如功率控制命令，信号质量，设备身份信息。 对于零功率调整，控制分量信号不发送。 对于非零调整，功率控制信号使用基站和无线终端已知的控制范围和限制，基于反馈信息进行缩放调整或同步。

公开(公告)号：US09338795B2

公开(公告)日：2016-05-10

申请号：US12778270

申请日：2010-05-12

Applicant: Arnab Das ,  Sundeep Rangan ,  Pablo Alejandro Anigstein ,  Murari Srinivasan

Inventor： Arnab Das ,  Sundeep Rangan ,  Pablo Alejandro Anigstein ,  Murari Srinivasan

IPC: H04B1/00 ,  H04W72/12 ,  H04B17/24 ,  H04W8/24 ,  H04W24/10

CPC classification number: H04W72/1284 ,  H04B17/24 ,  H04W8/24 ,  H04W24/10 ,  H04W72/1231

Abstract: Methods and apparatus for communicating transmission backlog information are described. Reporting control factors are utilized to expand reporting possibilities for a fixed bit size request report. At least one report control factor is determined as a function of channel quality information, power information, device capability information, and/or quality of service information. A transmission backlog report value is interpreted as a function of a reporting control factor. A wide range of quantization schemes for reporting transmission backlog information are facilitated corresponding to a small bit size report. A communications device can adaptively select a quantization request level closely matched to its current needs such as to provide an accurate representation of its current traffic channel resource needs. A communications device may request a number of frames in a request report and the same report may be indirectly requesting a number of communications segments needed to clear its transmission backlog.

Abstract translation: 描述用于传送传输积压信息的方法和装置。 报告控制因素用于扩展固定位大小请求报告的报告可能性。 至少一个报告控制因子被确定为信道质量信息，功率信息，设备能力信息和/或服务质量信息的函数。 传输积压报告值被解释为报告控制因子的函数。 用于报告传输积压信息的宽范围的量化方案对应于小位尺寸报告是便利的。 通信设备可以自适应地选择与其当前需求紧密匹配的量化请求级别，以提供其当前业务信道资源需求的精确表示。 通信设备可以在请求报告中请求多个帧，并且相同的报告可以间接地请求清除其传输积压所需的多个通信段。

公开(公告)号：US08571493B2

公开(公告)日：2013-10-29

申请号：US12606079

申请日：2009-10-26

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

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

IPC: H04B7/06

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

Abstract: 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：US08514771B2

公开(公告)日：2013-08-20

申请号：US11333771

申请日：2006-01-17

Applicant: Arnab Das ,  Sundeep Rangan

Inventor： Arnab Das ,  Sundeep Rangan

IPC: H04B7/185 ,  H04B7/00

CPC classification number: H04W52/146 ,  H04B17/24 ,  H04W24/10 ,  H04W52/16 ,  H04W52/325 ,  H04W52/365 ,  H04W52/367 ,  H04W52/54

Abstract: A wireless terminal determines the transmission power used for its dedicated control channel at a point in time, and generates a power report indicating a ratio of a maximum wireless terminal transmit power to the transmit power of the dedicated control channel at the point in time. The power report provides a measure of available transmit power for wireless terminal use for other purposes, e.g., uplink traffic channels, after taking into consideration the transmit power used for the dedicated control channel. The point in time has a known time offset from the start of a communications segment in which the power report is transmitted. This allows the base station receiving dedicated control channel uplink signals from the wireless terminal to measure the received signals, receive and process the communicated power report, and correlate information to be used for accurate wireless terminal closed loop power control.

公开(公告)号：US08503938B2

公开(公告)日：2013-08-06

申请号：US11487017

申请日：2006-07-14

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

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

IPC: H04B15/00

CPC classification number: H04W24/08 ,  H04B17/345 ,  H04B17/382 ,  H04W72/08

Abstract: 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.

Abstract translation: 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。