公开(公告)号：US08818285B2

公开(公告)日：2014-08-26

申请号：US12262022

申请日：2008-10-30

申请人： Mohammad J. Borran ,  Aamod Khandekar ,  Naga Bhushan ,  Ashwin Sampath ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Ravi Palanki ,  Gavin B. Horn

发明人： Mohammad J. Borran ,  Aamod Khandekar ,  Naga Bhushan ,  Ashwin Sampath ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Ravi Palanki ,  Gavin B. Horn

IPC分类号： H04B15/00 ,  H04B1/00 ,  H04W52/34 ,  H04W52/24 ,  H04W52/32 ,  H04W52/28

CPC分类号： H04W72/048 ,  H04W52/242 ,  H04W52/243 ,  H04W52/28 ,  H04W52/325 ,  H04W52/34

摘要： Techniques for transmitting data with short-term interference mitigation in a wireless communication system are described. In one design, a first station (e.g., a base station or a terminal) may receive a message sent by a second station to request reduction of interference on at least one resource. In response to receiving the message, the first station may determine a first transmit power level to use for the at least one resource based on one or more factors such as a priority metric sent in the message, the buffer size at the first station, etc. The first station may send a power decision pilot on the at least one resource at a second transmit power level determined based on the first transmit power level.

摘要翻译： 描述了在无线通信系统中发送具有短期干扰抑制的数据的技术。 在一种设计中，第一站（例如，基站或终端）可以接收由第二站发送的消息以请求减少对至少一个资源的干扰。 响应于接收到消息，第一站可以基于一个或多个因素来确定用于至少一个资源的第一发射功率电平，诸如消息中发送的优先级度量，第一站的缓冲器大小等 第一站可以基于第一发射功率电平确定的第二发射功率电平在所述至少一个资源上发送功率决定导频。

公开(公告)号：US08811973B2

公开(公告)日：2014-08-19

申请号：US12170560

申请日：2008-07-10

申请人： Rajiv Vijayan ,  Avneesh Agrawal ,  Sanjay Jha

发明人： Rajiv Vijayan ,  Avneesh Agrawal ,  Sanjay Jha

IPC分类号： H04W4/00

CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0066 ,  H04L27/2614 ,  H04W52/343 ,  H04W52/367

摘要： Techniques for managing peak-to-average power ratio (PAPR) for multi-carrier modulation in wireless communication systems. Different terminals in a multiple-access system may have different required transmit powers. The number of carriers to allocate to each terminal is made dependent on its required transmit power. Terminals with higher required transmit powers may be allocated fewer carriers (associated with smaller PAPR) to allow the power amplifier to operate at higher power levels. Terminals with lower required transmit powers may be allocated more carriers (associated with higher PAPR) since the power amplifier is operated at lower power levels. The specific carriers to assign to the terminals may also be determined by their transmit power levels to reduce out-of-band emissions. Terminals with higher required transmit powers may be assigned with carriers near the middle of the operating band, and terminals with lower required transmit powers may be assigned with carriers near the band edges.

摘要翻译： 用于管理无线通信系统中多载波调制的峰均功率比（PAPR）的技术。 多址系统中的不同终端可能具有不同的所需传输功率。 分配给每个终端的载波数量取决于其所需的发射功率。 具有更高所需发射功率的终端可以被分配较少的载波（与较小的PAPR相关联），以允许功率放大器在较高的功率电平下工作。 由于功率放大器在较低的功率电平下工作，所以具有较低所需发射功率的终端可以分配更多的载波（与更高的PAPR相关联）。 分配给终端的特定载波也可以由其发射功率电平来确定，以减少带外发射。 具有更高要求的发射功率的终端可以被分配到靠近工作频带中间的载波，并且具有较低所需发射功率的终端可以被分配给带边缘附近的载波。

公开(公告)号：US08811198B2

公开(公告)日：2014-08-19

申请号：US12256234

申请日：2008-10-22

申请人： Naga Bhushan ,  Avneesh Agrawal

发明人： Naga Bhushan ,  Avneesh Agrawal

IPC分类号： G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26 ,  H04W4/00 ,  H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H04B1/10 ,  H04W40/00 ,  H04B15/00 ,  H04B1/00 ,  H04B1/04 ,  H04W72/08 ,  H04W84/04 ,  H04W72/04 ,  H04W88/04 ,  H04W52/40 ,  H04W52/14

CPC分类号： H04W72/082 ,  H04W52/146 ,  H04W52/40 ,  H04W72/0406 ,  H04W84/045 ,  H04W88/04

摘要： Systems and methodologies are described that facilitate employing interference-overload indications to generate pilot strength reports that can be leveraged to mitigate reverse link interference. An affected base station can send interference-overload indications when experiencing a strong interference/jamming scenario due to reverse link transmission by an offending access terminal. The offending access terminal can monitor interference-overload indications from the affected base station (e.g., although the affected base station can be excluded from an active set of the offending access terminal) and send a pilot strength report to a serving base station in response. The serving base station can receive the interference induced pilot strength report and command the offending access terminal not to transmit on certain channel resources (e.g., time, frequency, spatial, . . . ); thus, the affected base station can use these resources to schedule transmission(s) by access terminal(s) served thereby.

摘要翻译： 描述了系统和方法，其便于采用干扰过载指示来产生可用于减轻反向链路干扰的导频强度报告。 由于受到违规接入终端的反向链路传输，受影响的基站可能会在遇到强干扰/干扰情况时发送干扰过载指示。 违规接入终端可以监测来自受影响的基站的干扰过载指示（例如，尽管受影响的基站可以从有罪的接入终端集合中排除），并且响应地向服务基站发送导频强度报告。 服务基站可以接收干扰诱导的导频强度报告，并指令违规接入终端不在某些信道资源（例如，时间，频率，空间等）上进行发射; 因此，受影响的基站可以使用这些资源来调度由其服务的接入终端的传输。

公开(公告)号：US08582509B2

公开(公告)日：2013-11-12

申请号：US11261832

申请日：2005-10-27

申请人： Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Rajiv Vijayan ,  Edward Harrison Teague ,  Fatih Ulupinar

发明人： Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal ,  Rajiv Vijayan ,  Edward Harrison Teague ,  Fatih Ulupinar

IPC分类号： H04Q7/00

CPC分类号： H04W28/20 ,  H04W8/22 ,  H04W72/12 ,  H04W72/1205 ,  H04W72/1268

摘要： To support mobile stations that are not capable of demodulating the entire bandwidth or that can be made to demodulate less than the entire bandwidth, a system, apparatus and method are provided to schedule users on less than all of the bandwidth. Further, certain users can be scheduled on more of the bandwidth than others.

摘要翻译： 为了支持不能解调整个带宽或者可以使其解调的小于整个带宽的移动站，提供了一种系统，装置和方法，以在小于全部带宽上调度用户。 此外，某些用户可以比其他用户更多地调度带宽。

公开(公告)号：US08559879B2

公开(公告)日：2013-10-15

申请号：US12425243

申请日：2009-04-16

申请人： Naga Bhushan ,  Alexei Y. Gorokhov ,  Mohammad J. Borran ,  Avneesh Agrawal ,  Aamod D. Khandekar ,  Tingfang Ji

发明人： Naga Bhushan ,  Alexei Y. Gorokhov ,  Mohammad J. Borran ,  Avneesh Agrawal ,  Aamod D. Khandekar ,  Tingfang Ji

IPC分类号： H04B1/00

CPC分类号： H04W72/082 ,  H04J11/0059 ,  H04L5/0007 ,  H04L5/0035 ,  H04L5/0048 ,  H04W24/08

摘要： Techniques for transmitting null pilots to support interference estimation in a wireless network are described. A null pilot is non-transmission on designated time-frequency resources by a cell or a cluster of cells supporting cooperative transmission to a UE. The received power of the null pilot from the cell or cluster of cells may be indicative of interference from other cells. In one design, a cell in the cluster may determine resources for sending a null pilot by the cell. The cell may transmit the null pilot (i.e., send no transmissions) on the resources to allow UEs to estimate out-of-cluster interference. Some or all cells in the cluster may transmit null pilots on the same resources. The cell may receive interference and channel information from the UE and may send data transmission to the UE based on the interference and/or channel information. Remaining cells in the cluster may reduce interference to the UE.

摘要翻译： 描述了用于发送空导频以支持无线网络中的干扰估计的技术。 空导频是通过支持向UE的协作传输的小区或小区集群在指定的时间 - 频率资源上进行非传输。 来自小区或小区簇的空导频的接收功率可以指示来自其他小区的干扰。 在一种设计中，集群中的小区可以确定用于由小区发送空导频的资源。 小区可以在资源上发送空导频（即，不发送传输），以允许UE估计簇外干扰。 集群中的一些或所有单元可以在相同的资源上传输空导频。 小区可以从UE接收干扰和信道信息，并且可以基于干扰和/或信道信息向UE发送数据传输。 群集中的剩余小区可以减少对UE的干扰。

公开(公告)号：US08543152B2

公开(公告)日：2013-09-24

申请号：US12121328

申请日：2008-05-15

申请人： Arak Sutivong ,  David Jonathan Julian ,  Avneesh Agrawal

发明人： Arak Sutivong ,  David Jonathan Julian ,  Avneesh Agrawal

IPC分类号： H04B7/00

CPC分类号： H04W52/247 ,  H04B17/309 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/20 ,  H04W24/00 ,  H04W52/125 ,  H04W52/146 ,  H04W52/16 ,  H04W52/20 ,  H04W52/24 ,  H04W52/241 ,  H04W52/242 ,  H04W52/243 ,  H04W52/283 ,  H04W52/36 ,  H04W52/362 ,  H04W52/367 ,  H04W52/54 ,  H04W52/60 ,  H04W88/08

摘要： Techniques for adjusting transmit power to mitigate both intra-sector interference to a serving base station and inter-sector interference to neighbor base stations are described. The amount of inter-sector interference that a terminal may cause may be roughly estimated based on the total interference observed by each neighbor base station, channel gains for the serving and neighbor base stations, and the current transmit power level. The transmit power may be decreased if high interference is observed by a neighbor base station and increased otherwise. The transmit power may be adjusted by a larger amount and/or more frequently if the terminal is located closer to the neighbor base station observing high interference and/or if the current transmit power level is higher, and vice versa. The intra-sector interference is maintained within an acceptable level by limiting a received SNR for the terminal to be within a range of allowable SNRs.

公开(公告)号：US08509162B2

公开(公告)日：2013-08-13

申请号：US12365777

申请日：2009-02-04

申请人： Gavin B. Horn ,  Avneesh Agrawal ,  Ashwin Sampath ,  Alexei Y. Gorokhov ,  Naga Bhushan

发明人： Gavin B. Horn ,  Avneesh Agrawal ,  Ashwin Sampath ,  Alexei Y. Gorokhov ,  Naga Bhushan

IPC分类号： H04W4/00 ,  H04J3/08

CPC分类号： H04W72/1263 ,  H04W72/00 ,  H04W72/04 ,  H04W72/0486 ,  H04W84/047 ,  H04W84/18 ,  H04W88/04

摘要： Systems and methodologies are described that facilitate scheduling over multiple hops in a wireless communication network. Radio resources can be partitioned into sets of sub-frames that can be allocated statically and/or dynamically. Statically allocated radio resources can be reassigned over time based on the loading on each hop and/or throughput imbalance. In addition, dynamic assignment of sub-frames to each hop can be based on traffic or channel conditions. Moreover, the radio resources can be dynamically allocated in a distributed scheme, wherein a base station controls the scheduling of resources, or a centralized scheme, wherein a relay station controls the scheduling of resources. Furthermore the allocation of radio resources can be transparent or explicit. In the transparent case, the access terminal listens directly to the base station, and the relay station does not transmit control information, such as DL or UL assignments. Conversely, when the allocation of resources is explicit the relay station does transmit control information.

摘要翻译： 描述了有助于在无线通信网络中的多跳上进行调度的系统和方法。 无线电资源可以被划分成静态和/或动态分配的子帧集合。 基于每跳和/或吞吐量不平衡的负载，可以随时间重新分配静态分配的无线电资源。 此外，每个跳跃的子帧的动态分配可以基于业务或信道条件。 此外，无线电资源可以以分布式方案动态分配，其中基站控制资源的调度或集中式方案，其中中继站控制资源的调度。 此外，无线电资源的分配可以是透明或明确的。 在透明情况下，接入终端直接监听基站，中继站不发送DL或UL分配等控制信息。 相反，当资源分配明确时，中继站确实发送控制信息。

公开(公告)号：US08504091B2

公开(公告)日：2013-08-06

申请号：US12359989

申请日：2009-01-26

申请人： Ravi Palanki ,  Aamod D. Khandekar ,  Naga Bhushan ,  Avneesh Agrawal

发明人： Ravi Palanki ,  Aamod D. Khandekar ,  Naga Bhushan ,  Avneesh Agrawal

IPC分类号： H04B7/005

CPC分类号： H04W72/0413 ,  H04W52/244 ,  H04W72/082 ,  Y02D70/00

摘要： Techniques for mitigating interference on control channels in a wireless communication network are described. In an aspect, high interference on radio resources used for a control channel may be mitigated by sending a request to reduce interference to one or more interfering stations. Each interfering station may reduce its transmit power on the radio resources, which may then allow the control channel to observe less interference. In one design, a user equipment (UE) may detect high interference on radio resources used for a control channel by a desired base station. The UE may send a request to reduce interference on the radio resources to an interfering base station, which may reduce its transmit power on the radio resources. The UE may receive the control channel on the radio resources from the desired base station and may observe less interference from the interfering base station.

摘要翻译： 描述了用于减轻无线通信网络中的控制信道上的干扰的技术。 在一个方面，可以通过发送减少对一个或多个干扰站的干扰的请求来减轻用于控制信道的无线电资源的高干扰。 每个干扰站可以减少其在无线电资源上的发射功率，这然后可以允许控制信道观测到更少的干扰。 在一种设计中，用户设备（UE）可以通过期望的基站检测用于控制信道的无线电资源的高干扰。 UE可以向干扰基站发送减少对无线电资源的干扰的请求，这可能降低其对无线电资源的发射功率。 UE可以从期望的基站在无线电资源上接收控制信道，并且可以观察到来自干扰基站的较少的干扰。

公开(公告)号：US08498669B2

公开(公告)日：2013-07-30

申请号：US11398077

申请日：2006-04-04

申请人： Ayman Fawzy Naguib ,  Avneesh Agrawal ,  Alexei Gorokhov

发明人： Ayman Fawzy Naguib ,  Avneesh Agrawal ,  Alexei Gorokhov

IPC分类号： G08B5/22

CPC分类号： H01Q3/267

摘要： Calibration for a transmit chain of a device transmitting information to multiple devices over wireless links and receive chains of the multiple devices receiving information over one of the wireless links utilizing a plurality of forward link channel estimates received from at least some of the plurality of devices and a plurality of reverse link channel estimates from the plurality of devices.

摘要翻译： 用于通过无线链路向多个设备发送信息的设备的发送链的校准，以及利用从多个设备中的至少一些设备接收的多个前向链路信道估计，通过无线链路之一接收信息的多个设备的链接;以及 来自多个设备的多个反向链路信道估计。

公开(公告)号：US08483691B2

公开(公告)日：2013-07-09

申请号：US12141557

申请日：2008-06-18

申请人： Tingfang Ji ,  Avneesh Agrawal ,  Edward Harrison Teague

发明人： Tingfang Ji ,  Avneesh Agrawal ,  Edward Harrison Teague

IPC分类号： H04W36/00 ,  H04W40/00

CPC分类号： H04W16/12 ,  H04W16/02 ,  H04W72/0453 ,  H04W72/082

摘要： For restrictive reuse, each cell (or each sector) is assigned (1) a set of usable subbands that may be allocated to users in the cell and (2) a set of forbidden subbands that is not used. The usable and forbidden sets for each cell are orthogonal to one other. The usable set for each cell also overlaps the forbidden set for each neighboring cell. A user u in a cell x may be allocated subbands in the usable set for that cell. If user u observes/causes high level of interference from/to a neighboring cell y, then user u may be allocated subbands from a “restricted” set containing subbands included in both the usable set for cell x and the forbidden set for cell y. User u would then observe/cause no interference from/to cell y. The subband restriction may be extended to avoid interference from multiple neighboring cells.

摘要翻译： 对于限制性重用，分配每个小区（或每个扇区）（1）可以分配给小区中的用户的一组可用子带，以及（2）未使用的一组禁止子带。 每个单元的可用和禁止的集合彼此正交。 每个单元的可用集合也与每个相邻单元的禁止集重叠。 小区x中的用户u可以被分配给该小区的可用集合中的子带。 如果用户u观察到/来自相邻小区y的高水平的干扰，则可以从包含小区x的可用集合和小区y的禁止集合的包含子带的“限制”集合中分配用户u的子带。 用户u然后将观察/不造成来自/到小区y的干扰。 可以扩展子带限制以避免来自多个相邻小区的干扰。