公开(公告)号：US08036151B2

公开(公告)日：2011-10-11

申请号：US11611882

申请日：2006-12-17

Applicant: Arnab Das ,  Prashanth Hande ,  Sundeep Rangan ,  Xinzhou Wu ,  Juergen Cezanne

Inventor： Arnab Das ,  Prashanth Hande ,  Sundeep Rangan ,  Xinzhou Wu ,  Juergen Cezanne

IPC: G08C17/00

CPC classification number: H04L1/0015 ,  H04L1/0002 ,  H04L1/0033 ,  H04W52/146 ,  H04W52/242 ,  H04W52/243 ,  H04W52/367

Abstract: Systems and methodologies are described that facilitate utilizing power-based rate signaling for uplink scheduling in a wireless communications system. A maximum nominal power (e.g., relative maximum transmit power that may be employed on an uplink) may be known to both a base station and a mobile device. For example, the base station and the mobile device may agree upon a maximum nominal power. According to another example, signaling related to a maximum nominal power for utilization on the uplink may be provided over a downlink. Further, selection of a code rate, modulation scheme, and the like for the uplink may be effectuated by a mobile device as a function of the maximum nominal power. Moreover, such selection may be based at least in part upon an interference cost, which may be evaluated by the mobile device.

Abstract translation: 描述了有助于在无线通信系统中利用基于功率的速率信令用于上行链路调度的系统和方法。 基站和移动设备可以知道最大额定功率（例如，可以在上行链路上采用的相对最大发射功率）。 例如，基站和移动设备可以达成最大额定功率。 根据另一示例，可以在下行链路上提供与在上行链路上的最大标称功率有关的信令。 此外，用于上行链路的码率，调制方案等的选择可以由移动设备作为最大额定功率的函数来实现。 此外，这样的选择可以至少部分地基于可由移动设备评估的干扰成本。

公开(公告)号：US20100240382A1

公开(公告)日：2010-09-23

申请号：US12727159

申请日：2010-03-18

Applicant: Ashwin Sampath ,  Sundeep Rangan ,  Raja Sekhar Bachu

Inventor： Ashwin Sampath ,  Sundeep Rangan ,  Raja Sekhar Bachu

IPC: H04W72/04

CPC classification number: H04W24/02 ,  H04W72/08 ,  H04W72/082 ,  H04W84/045

Abstract: Systems, apparatus, methods and computer program products are provided. In some embodiments, a method for facilitating interference management in an unplanned wireless communication system is provided. The method can include a non-serving base station: determining information about a user equipment, wherein the user equipment is served by a serving base station; and employing determined information about the user equipment to perform interference management at a non-serving base station. The method can also include the non-serving base station synchronizing to the user equipment using information indicative of the uplink scrambling code for use by the user equipment and information indicative of uplink slot configurations being used by the user equipment. The method can also include the non-serving base station performing interference management on the user equipment served by the serving base station.

Abstract translation: 提供系统，设备，方法和计算机程序产品。 在一些实施例中，提供了一种用于促进非计划无线通信系统中的干扰管理的方法。 该方法可以包括非服务基站：确定关于用户设备的信息，其中所述用户设备由服务基站服务; 并且使用关于用户设备的确定信息来在非服务基站执行干扰管理。 该方法还可以包括使用指示用户设备使用的上行链路扰码的信息和表示用户设备使用的上行链路时隙配置的信息与用户设备同步的非服务基站。 该方法还可以包括对服务基站服务的用户设备执行干扰管理的非服务基站。

公开(公告)号：US20100144282A1

公开(公告)日：2010-06-10

申请号：US12630130

申请日：2009-12-03

Applicant: Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan

Inventor： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan

IPC: H04B15/00 ,  H04B7/005

CPC classification number: H04B7/0626

Abstract: 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.

Abstract translation: 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：US20100041355A1

公开(公告)日：2010-02-18

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: H04B1/04

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.

Abstract translation: 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：US20090257351A1

公开(公告)日：2009-10-15

申请号：US12268138

申请日：2008-11-10

Applicant: Prashanth Hande ,  Xinzhou Wu ,  Sundeep Rangan

Inventor： Prashanth Hande ,  Xinzhou Wu ,  Sundeep Rangan

IPC: H04L12/24

CPC classification number: H04W28/02 ,  H04L47/70 ,  H04W72/1252 ,  H04W74/002 ,  H04W84/18

Abstract: Methods and apparatus related to communicating and/or using load information in support of decentralized traffic scheduling decisions are described. Individual wireless terminals corresponding to a peer to peer connection which desire to communicate traffic signals make transmitter yielding and/or receiver yielding decisions on a traffic slot by traffic slot basis. Loading information is used to intentionally skew transmitter yielding decisions in response to conditions and/or needs in the system. A link load weight value is generated based on intended transmitter loading related information and/or intended receiver loading related information. Traffic request parameters and/or link load weight values are communicated between wireless communications devices in request and/or request response signaling. As part of a transmitter yielding decision, one or more of: a spillage value, weighted SINR, and an interference cost estimate is calculated based on: one or more link load weight values and channel condition measurement information.

Abstract translation: 描述了与支持分散式业务调度决策的通信和/或使用负载信息有关的方法和装置。 对应于对等连接的各个无线终端希望传送业务信号使业务时隙基于业务时隙的发射机收敛和/或接收者收益决定。 加载信息用于有意地根据系统中的条件和/或需要来偏移发射机的出错决定。 基于预期的发射机加载相关信息和/或预期的接收机加载相关信息来生成链路负载权重值。 在请求和/或请求响应信令中的无线通信设备之间传送业务请求参数和/或链路负载权重值。 作为发射机产生决定的一部分，基于：一个或多个链路负载权重值和信道条件测量信息来计算溢出值，加权SINR和干扰成本估计中的一个或多个。

公开(公告)号：US07567791B2

公开(公告)日：2009-07-28

申请号：US11229847

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: H04B1/16

CPC classification number: H04W52/0235 ,  H04W52/0206 ,  Y02D70/00

Abstract: Wireless terminal for use with a multi-mode base station that supports a transmit standby mode and an active mode is described. 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 from the wireless terminal, hand-off signals, etc.

Abstract translation: 描述了与支持发送待机模式和活动模式的多模式基站一起使用的无线终端。 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。 从发射待机到激活的模式转换可以响应于：调度信息，接入信号，来自无线终端的唤醒信号，切换信号等。

公开(公告)号：US20090129345A1

公开(公告)日：2009-05-21

申请号：US11943517

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: H04Q7/20

CPC classification number: H04W72/1231 ,  H04W72/1278

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).

Abstract translation: 描述了有助于调度上行链路传输的系统和方法。 例如，可以利用时间共享方案，使得不同的移动设备可以被调度为在不同时隙期间进行传输; 然而，也可以考虑采用静态方案。 根据图示，可以将干扰预算与与基站相关联的时变加权因子组合; 加权因子可以被预先定义和/或自适应地调整（例如，基于负载均衡机制）。 此外，加权干扰预算可以用于选择用于上行链路传输的移动设备（例如，至少部分地基于移动设备的路径损耗比率）。 此外，不同的干扰预算可以在特定时间由扇区的不同信道来利用。 此外，例如，基站可以分配要由无线终端利用以产生信道质量报告的负载因子。

公开(公告)号：US20090129331A1

公开(公告)日：2009-05-21

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: H04Q7/00 ,  H04Q7/20

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：US20080151829A1

公开(公告)日：2008-06-26

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: H04Q7/00

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：US20070258365A1

公开(公告)日：2007-11-08

申请号：US11610189

申请日：2006-12-13

Applicant: Arnab DAS ,  Sundeep Rangan ,  Yunus Hussain ,  Samel Celebi

Inventor： Arnab DAS ,  Sundeep Rangan ,  Yunus Hussain ,  Samel Celebi

IPC: H04J3/14

CPC classification number: H04W72/1284 ,  H04W72/1221 ,  H04W72/1252

Abstract: Methods and apparatus for efficient communication of backlog information, e.g., backlog information indicating amounts of uplink traffic waiting to transmitted by a wireless terminal are described. Delta backlog reports are used in addition to absolute backlog reports, thus reducing control signaling overhead, at least some information communicated in a delta backlog report being referenced with respect to a previously transmitted backlog report. A base station uses received backlog information from wireless terminals in determining scheduling of uplink traffic channel segments In some embodiments, the absolute backlog report uses a first fixed size report format, while the delta backlog report using a second fixed size report format, said second size being different from said first fixed size.

Abstract translation: 描述了用于积压信息的有效通信的方法和装置，例如指示等待由无线终端发送的上行链路业务量的积压信息。 除了绝对的积压报告之外，还使用了增量积压报告，从而减少了控制信号开销，至少在以前发送的积压报告中引用的增量积压报告中传达的至少一些信息。 基站在确定上行链路业务信道段的调度中使用来自无线终端的接收的积压信息。在一些实施例中，绝对积压报告使用第一固定大小报告格式，而使用第二固定大小报告格式的差异积压报告，所述第二大小 与所述第一固定尺寸不同。