公开(公告)号：US08989084B2

公开(公告)日：2015-03-24

申请号：US11549604

申请日：2006-10-13

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

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

IPC: H04W4/00 ,  H04W16/08 ,  H04W16/06

CPC classification number: H04W16/08 ,  H04B17/24 ,  H04B17/382 ,  H04W4/06 ,  H04W16/06 ,  H04W24/10 ,  H04W36/20 ,  H04W52/143 ,  H04W52/343 ,  H04W52/40 ,  H04W72/082

Abstract: Methods and apparatus are described where loading information regarding loading conditions at a neighboring base station is received at a first base station and then communicated, e.g., broadcast, by the first base station to mobiles within the cell in which the first base station is located. Since the neighbor base station's loading information is being communicated to a mobile currently connected to the first base station via a reliable communications channel of the first base station, the mobile can be expected to be able to reliably recover loading factor information corresponding to not only the first base station but to the neighboring base station. By utilizing such loading factor information, the mobile can generate an improved uplink interference report. The first base station receives such interference reports from wireless terminals in its cell, facilitating efficient resource allocation and interference control.

Abstract translation: 描述了在第一基站处接收关于相邻基站处的负载条件的信息的装置，然后由第一基站传送（例如，广播）到第一基站所在的小区内的移动台。 由于相邻基站的载入信息通过第一基站的可靠通信信道被传送到当前连接到第一基站的移动台，所以可以期望移动台能够可靠地恢复与不仅仅是 第一个基站，但是到邻近的基站。 通过利用这种负载因子信息，移动台可以产生改进的上行链路干扰报告。 第一基站从其小区中的无线终端接收到这种干扰报告，有利于高效的资源分配和干扰控制。

公开(公告)号：US08811348B2

公开(公告)日：2014-08-19

申请号：US11333788

申请日：2006-01-17

Applicant: Sundeep Rangan ,  Rajiv Laroia ,  Arnab Das ,  Junyi Li ,  John Fan

Inventor： Sundeep Rangan ,  Rajiv Laroia ,  Arnab Das ,  Junyi Li ,  John Fan

IPC: H04W4/00

CPC classification number: H04W24/10 ,  H04B17/24 ,  H04B17/336

Abstract: A wireless terminal measures the received power of a tone corresponding to an intention base station null output, measures the received power of pilot signals, and determines a signal to noise ratio of the received pilot signal. The wireless terminal calculates a downlink signal to noise ratio saturation level representative of the SNR of a received downlink signal that the wireless terminal would measure on a received signal transmitted by the base station at infinite power. The calculated downlink signal to noise ratio saturation level is a function of the determined interference power, the measured received pilot signal power, and the determined pilot signal SNR. A report is generated corresponding to one of a plurality of quantized levels, the selected quantized level being the closest representation to the calculated downlink signal to noise ratio saturation level. The generated report is communicated using a dedicated control channel segment in a predetermined uplink timing structure.

Abstract translation: 无线终端测量对应于意图基站空输出的音调的接收功率，测量导频信号的接收功率，并确定接收到的导频信号的信噪比。 无线终端计算表示无线终端将以无限大功率发送的接收信号对接收到的下行链路信号的SNR进行SNR测量的下行链路信噪比饱和度。 所计算的下行链路信噪比饱和电平是所确定的干扰功率，测量的接收导频信号功率和确定的导频信号SNR的函数。 产生对应于多个量化电平中的一个的报告，所选择的量化电平是与所计算的下行链路信噪比饱和电平最接近的表示。 使用专用控制信道段在预定的上行链路定时结构中传送所生成的报告。

公开(公告)号：US08774846B2

公开(公告)日：2014-07-08

申请号：US11621955

申请日：2007-01-10

Applicant: Rajiv Laroia ,  Sundeep Rangan ,  Arnab Das ,  Frank A. Lane ,  Junyi Li

Inventor： Rajiv Laroia ,  Sundeep Rangan ,  Arnab Das ,  Frank A. Lane ,  Junyi Li

IPC: H04B7/00 ,  H04W36/00

CPC classification number: H04W40/244 ,  H04J3/0602 ,  H04L5/0016 ,  H04L5/0035 ,  H04L5/0048 ,  H04L27/2601 ,  H04L27/261 ,  H04W8/005 ,  H04W16/14 ,  H04W28/04 ,  H04W28/18 ,  H04W36/16 ,  H04W36/24 ,  H04W40/24 ,  H04W48/08 ,  H04W48/16 ,  H04W48/20 ,  H04W52/0229 ,  H04W52/04 ,  H04W72/02 ,  H04W76/14 ,  H04W84/042 ,  H04W84/18 ,  H04W88/02 ,  H04W88/04 ,  H04W88/06 ,  H04W88/10 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/22 ,  Y02D70/23

Abstract: A portable wireless terminal generates and transmits a beacon signal. The beacon signal includes a sequence of beacon signal bursts, each beacon signal burst including one or more beacon symbols. A beacon symbol is transmitted using the air link resources of a beacon symbol transmission unit at a relatively high transmission power level with respect to user data symbols transmitted from the same wireless terminal, thus facilitating easy detection by other wireless terminals. The beacon symbols of the beacon signal occupy a small fraction of the total available air link resources. Beacon signals can, and sometimes do, convey wireless terminal identification information, via the location of the beacon symbols within the portion of the air link resource reserved for beacon symbol transmission units.

Abstract translation: 便携式无线终端生成并发送信标信号。 信标信号包括信标信号脉冲序列，每个信标信号脉冲串包括一个或多个信标符号。 相对于从同一无线终端发送的用户数据符号，以相对高的发送功率电平的信标符号发送单元的空中链路资源发送信标符号，便于其他无线终端的容易检测。 信标信号的信标符号占据总可用空中链路资源的一小部分。 信标信号可以并且有时可以通过为为信标符号传输单元预留的空中链路资源的部分内的信标符号的位置传送无线终端识别信息。

公开(公告)号：US08743843B2

公开(公告)日：2014-06-03

申请号：US11621957

申请日：2007-01-10

Applicant: Rajiv Laroia ,  Sundeep Rangan ,  Arnab Das ,  Frank A. Lane ,  Junyi Li

Inventor： Rajiv Laroia ,  Sundeep Rangan ,  Arnab Das ,  Frank A. Lane ,  Junyi Li

IPC: H04J3/00

CPC classification number: H04W40/244 ,  H04J3/0602 ,  H04L5/0016 ,  H04L5/0035 ,  H04L5/0048 ,  H04L27/2601 ,  H04L27/261 ,  H04W8/005 ,  H04W16/14 ,  H04W28/04 ,  H04W28/18 ,  H04W36/16 ,  H04W36/24 ,  H04W40/24 ,  H04W48/08 ,  H04W48/16 ,  H04W48/20 ,  H04W52/0229 ,  H04W52/04 ,  H04W72/02 ,  H04W76/14 ,  H04W84/042 ,  H04W84/18 ,  H04W88/02 ,  H04W88/04 ,  H04W88/06 ,  H04W88/10 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/22 ,  Y02D70/23

Abstract: Wireless terminal beacon signaling is used to achieve timing synchronization between two wireless terminals in a wireless communication system, e.g., in an ad hoc network lacking a centralized timing reference. An exemplary timing structure used by an individual wireless terminal includes a beacon transmission time interval, a beacon monitoring time interval and a silence time interval. A first wireless terminal monitoring for beacon signals from other wireless terminals, detects a beacon signal portion from a second wireless terminal and determines a timing adjustment as a function of the detected beacon signal portion. The first wireless terminal applies the determined timing adjustment, e.g., time shifting its timing structure, such that its beacon signal can be detected by the second wireless terminal. Implementation of the determined timing adjustment sets the timing structures of the two wireless terminals to have a fixed relationship thereby allowing for coordinated communications including a peer-to-peer communications session.

Abstract translation: 无线终端信标信令用于实现无线通信系统中的两个无线终端之间的定时同步，例如在缺乏集中定时参考的自组织网络中。 单个无线终端使用的示例性定时结构包括信标发送时间间隔，信标监视时间间隔和静默时间间隔。 监测来自其他无线终端的信标信号的第一无线终端从第二无线终端检测信标信号部分，并根据检测到的信标信号部分确定定时调整。 第一无线终端应用确定的定时调整，例如时移其定时结构，使得其信标信号可被第二无线终端检测。 确定的定时调整的实现将两个无线终端的定时结构设置为具有固定关系，从而允许包括对等通信会话的协调通信。

公开(公告)号：US20140134953A9

公开(公告)日：2014-05-15

申请号：US11333788

申请日：2006-01-17

Applicant: Sundeep Rangan ,  Rajiv Laroia ,  Arnab Das ,  Junyi Li ,  John Fan

Inventor： Sundeep Rangan ,  Rajiv Laroia ,  Arnab Das ,  Junyi Li ,  John Fan

IPC: H04B1/00

CPC classification number: H04W24/10 ,  H04B17/24 ,  H04B17/336

Abstract: A wireless terminal measures the received power of a tone corresponding to an intention base station null output, measures the received power of pilot signals, and determines a signal to noise ratio of the received pilot signal. The wireless terminal calculates a downlink signal to noise ratio saturation level representative of the SNR of a received downlink signal that the wireless terminal would measure on a received signal transmitted by the base station at infinite power. The calculated downlink signal to noise ratio saturation level is a function of the determined interference power, the measured received pilot signal power, and the determined pilot signal SNR. A report is generated corresponding to one of a plurality of quantized levels, the selected quantized level being the closest representation to the calculated downlink signal to noise ratio saturation level. The generated report is communicated using a dedicated control channel segment in a predetermined uplink timing structure.

Abstract translation: 无线终端测量对应于意图基站空输出的音调的接收功率，测量导频信号的接收功率，并确定接收到的导频信号的信噪比。 无线终端计算表示无线终端将以无限大功率发送的接收信号对接收到的下行链路信号的SNR进行SNR测量的下行链路信噪比饱和度。 所计算的下行链路信噪比饱和电平是所确定的干扰功率，测量的接收导频信号功率和确定的导频信号SNR的函数。 产生对应于多个量化电平中的一个的报告，所选择的量化电平是与所计算的下行链路信噪比饱和电平最接近的表示。 使用专用控制信道段在预定的上行链路定时结构中传送所生成的报告。

公开(公告)号：US08547857B2

公开(公告)日：2013-10-01

申请号：US11943489

申请日：2007-11-20

Applicant: Xinzhou Wu ,  Sundeep Rangan ,  Prashanth Hande ,  Arnab Das ,  Junyi Li

Inventor： Xinzhou Wu ,  Sundeep Rangan ,  Prashanth Hande ,  Arnab Das ,  Junyi Li

IPC: H04W72/00 ,  H04W4/00 ,  H04W24/00 ,  H04L12/26 ,  H04B15/00

CPC classification number: H04W72/082 ,  H04W72/0406 ,  H04W72/12

Abstract: Systems and methodologies are described that facilitate scheduling uplink transmissions. For instance, a time sharing scheme can be utilized such that differing mobile devices can be scheduled to transmit during differing time slots; however, it is also contemplated that a static scheme can be employed. Pursuant to an illustration, an interference budget can be combined with a time varying weighting factor associated with a base station; the weighting factor can be predefined and/or adaptively adjusted (e.g., based upon a load balancing mechanism). Moreover, the weighted interference budget can be leveraged for selecting mobile devices for uplink transmission (e.g., based at least in part upon path loss ratios of the mobile devices). Further, disparate interference budgets can be utilized by differing channels of a sector at a particular time. Also, for example, a base station can assign a loading factor to be utilized by wireless terminal(s) for generating channel quality report(s).

公开(公告)号：US08477684B2

公开(公告)日：2013-07-02

申请号：US11943551

申请日：2007-11-20

Applicant: Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Sundeep Rangan ,  Arnab Das

Inventor： Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Sundeep Rangan ,  Arnab Das

IPC: H04W4/00

CPC classification number: H04L1/1607 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0053 ,  H04W72/0413 ,  H04W72/042

Abstract: Techniques for sending control messages are described. In an aspect, assignment messages may be acknowledged based on either linked or dedicated acknowledgement (ACK) resources. A terminal may receive an assignment message from a base station, determine whether to acknowledge the assignment message, and determine ACK resources to use to acknowledge the assignment message. The ACK resources may be linked to a control block on which the assignment message was received, linked to resources given by the assignment message, or assigned to the terminal. The terminal may send the acknowledgement on the ACK resources. In another aspect, a control message may be acknowledged based on ACK resources determined based on the control message or the control block. The ACK resources may be linked to resources assigned by the control message or linked to the control message. The terminal may send an acknowledgement for the control message on the ACK resources.

Abstract translation: 描述用于发送控制消息的技术。 在一方面，可以基于链接或专用确认（ACK）资源来确认分配消息。 终端可以从基站接收分配消息，确定是否确认分配消息，并确定用于确认分配消息的ACK资源。 ACK资源可以链接到其上接收到分配消息的控制块，链接到由分配消息给出的资源或分配给终端。 终端可以在ACK资源上发送确认。 在另一方面，可以基于基于控制消息或控制块确定的ACK资源来确认控制消息。 ACK资源可以链接到由控制消息分配或链接到控制消息的资源。 终端可以在ACK资源上发送关于控制消息的确认。

公开(公告)号：US08451961B2

公开(公告)日：2013-05-28

申请号：US11944197

申请日：2007-11-21

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

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

IPC: H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08 ,  H04L27/26

CPC classification number: H04L27/2647 ,  H04B1/7103 ,  H04B7/0854 ,  H04B7/0857 ,  H04B2201/70702

Abstract: Various schemes for reducing effects of interference within communication systems are disclosed. A transmitter transmits a signal in a first time interval and a scrambled version of the signal in a second time interval, which does not overlap with the first time interval. A receiver receives a composite signal including a signal transmitted from the desired transmitter as well as signals from interferers in the first or the second time interval. The receiver determines a dominant interferer and obtains knowledge of signal scrambling done by the interferer as well as the desired transmitter by sensing an identification associated with the interferer or the desired transmitter. This knowledge is employed to determine coefficients for combining the received composite signals received in the first and the second time interval in order to recover the desired signal in a manner that maximizes the SNR associated with the desired signal or completely cancels the dominant interference.

Abstract translation: 公开了用于减少通信系统内的干扰影响的各种方案。 发射机以与第一时间间隔不重叠的第二时间间隔发送第一时间间隔中的信号和信号的加扰版本。 接收机在第一或第二时间间隔中接收包括从所需发射机发送的信号以及来自干扰源的信号的复合信号。 接收机确定主要干扰源，并且通过感测与干扰源或期望发射机相关联的标识来获得由干扰源以及所需发射机完成的信号加扰的知识。 该知识用于确定用于组合在第一和第二时间间隔中接收的接收的复合信号的系数，以便以最大化与期望信号相关联的SNR或完全抵消显性干扰的方式恢复期望信号。

公开(公告)号：US08432852B2

公开(公告)日：2013-04-30

申请号：US11486652

申请日：2006-07-14

Applicant: Sundeep Rangan ,  Junyi Li

Inventor： Sundeep Rangan ,  Junyi Li

IPC: H04W4/00

CPC classification number: H04W56/0005 ,  H04L5/0051 ,  H04L27/2655 ,  H04W56/0075

Abstract: The claimed subject matter relates to systems and methodologies for synchronizing timing between a base station and a wireless terminal. For example, a set of non-contiguous tones may be assigned to the terminal, and may be equally spaced apart from each other across a spectrum of all available tones. A set of contiguous tones may also be assigned to the terminal, which may transmit a timing control signal during a specified transmit time. A base station may receive the signal, which comprises information related to the non-contiguous and contiguous tone sets, and may determine a distance of the terminal to the base station based on measured and anticipated arrival time of the signal. The base station may transmit a timing correction command signal to the terminal based on such information.

Abstract translation: 所要求保护的主题涉及用于在基站和无线终端之间同步定时的系统和方法。 例如，可以将一组非连续音调分配给终端，并且可以在所有可用音调的频谱上彼此相等间隔开。 一组连续的音调也可以被分配给终端，其可以在指定的发送时间期间发送定时控制信号。 基站可以接收信号，该信号包括与非连续和连续音调集相关的信息，并且可以基于信号的测量和预期到达时间来确定终端与基站的距离。 基站可以基于这样的信息向终端发送定时校正命令信号。

公开(公告)号：US08320928B2

公开(公告)日：2012-11-27

申请号：US13218647

申请日：2011-08-26

Applicant: Xinzhou Wu ,  Sundeep Rangan ,  Prashanth Hande ,  Arnab Das ,  Junyi Li

Inventor： Xinzhou Wu ,  Sundeep Rangan ,  Prashanth Hande ,  Arnab Das ,  Junyi Li

IPC: H04W88/02

CPC classification number: H04W72/1231 ,  H04W72/1268

Abstract: Systems and methodologies are described that facilitate scheduling uplink transmissions. For instance, a time sharing scheme can be utilized such that differing mobile devices can be scheduled to transmit during differing time slots; however, it is also contemplated that a static scheme can be employed. Pursuant to an illustration, an interference budget can be combined with a time varying weighting factor associated with a base station; the weighting factor can be predefined and/or adaptively adjusted (e.g., based upon a load balancing mechanism). Moreover, the weighted interference budget can be leveraged for selecting mobile devices for uplink transmission (e.g., based at least in part upon path loss ratios of the mobile devices). Further, disparate interference budgets can be utilized by differing channels of a sector at a particular time. Also, for example, a base station can assign a loading factor to be utilized by wireless terminal(s) for generating channel quality report(s).