公开(公告)号：US07957327B2

公开(公告)日：2011-06-07

申请号：US11435572

申请日：2006-05-16

申请人： Aamod Khandekar ,  Arak Sutivong ,  Ravi Palanki

发明人： Aamod Khandekar ,  Arak Sutivong ,  Ravi Palanki

IPC分类号： H04Q7/36

CPC分类号： H04W24/00 ,  H04B1/713 ,  H04L5/0026 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/023 ,  H04L5/1461 ,  H04L5/1469 ,  H04L25/0226 ,  H04W28/20 ,  H04W72/042 ,  H04W88/08

摘要： Systems and methodologies are described that facilitate providing time-division duplexed beam-forming support in traditionally non-time-division duplexed wireless systems, such as an OFDMA system, a WCDMA system, etc. According to an aspect, a base station can analyze pilot information, such as a portion of bandwidth over which a user device is transmitting, and can transmit on the downlink using pre-hopped portion of bandwidth utilized by the user device on the preceding reverse link time slot. The base station can additionally transmit bandwidth segment reassignments to the user device to facilitate bandwidth segment hopping between user devices served by the base station. Additionally, the base station can instruct the user device to provide on-demand pilot information to resolve ambiguity related thereto.

摘要翻译： 描述了有助于在诸如OFDMA系统，WCDMA系统等传统的非时分双工无线系统中提供时分双工的波束形成支持的系统和方法。根据一方面，基站可以分析导频 信息，诸如用户设备正在发送的带宽的一部分，并且可以使用在前一反向链路时隙上的用户设备利用的带宽的预跳跃部分在下行链路上进行发送。 基站可以另外向用户设备发送带宽段重新分配，以便于由基站服务的用户设备之间的带宽段跳频。 此外，基站可以指示用户设备提供按需导频信息以解决与之相关的模糊性。

公开(公告)号：US20060274679A1

公开(公告)日：2006-12-07

申请号：US11435572

申请日：2006-05-16

申请人： Aamod Khandekar ,  Arak Sutivong ,  Ravi Palanki

发明人： Aamod Khandekar ,  Arak Sutivong ,  Ravi Palanki

IPC分类号： H04B7/005 ,  H04L5/14

CPC分类号： H04W24/00 ,  H04B1/713 ,  H04L5/0026 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/023 ,  H04L5/1461 ,  H04L5/1469 ,  H04L25/0226 ,  H04W28/20 ,  H04W72/042 ,  H04W88/08

摘要： Systems and methodologies are described that facilitate providing time-division duplexed beam-forming support in traditionally non-time-division duplexed wireless systems, such as an OFDMA system, a WCDMA system, etc. According to an aspect, a base station can analyze pilot information, such as a portion of bandwidth over which a user device is transmitting, and can transmit on the downlink using pre-hopped portion of bandwidth utilized by the user device on the preceding reverse link time slot. The base station can additionally transmit bandwidth segment reassignments to the user device to facilitate bandwidth segment hopping between user devices served by the base station. Additionally, the base station can instruct the user device to provide on-demand pilot information to resolve ambiguity related thereto.

摘要翻译： 描述了有助于在诸如OFDMA系统，WCDMA系统等传统的非时分双工无线系统中提供时分双工的波束形成支持的系统和方法。根据一方面，基站可以分析导频 信息，诸如用户设备正在发送的带宽的一部分，并且可以使用在前一反向链路时隙上的用户设备利用的带宽的预跳跃部分在下行链路上进行发送。 基站可以另外向用户设备发送带宽段重新分配，以便于由基站服务的用户设备之间的带宽段跳频。 此外，基站可以指示用户设备提供按需导频信息以解决与之相关的模糊性。

公开(公告)号：US08730877B2

公开(公告)日：2014-05-20

申请号：US11242115

申请日：2005-09-30

申请人： Ravi Palanki ,  Aamod Khandekar ,  Arak Sutivong

发明人： Ravi Palanki ,  Aamod Khandekar ,  Arak Sutivong

IPC分类号： H04W4/00

CPC分类号： H04B7/04 ,  H04L1/1819 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0206 ,  H04L25/022 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0256

摘要： In a single-carrier frequency division multiple access (SC-FDMA) system that utilizes interleaved FDMA (IFDMA) or localized FDMA, multiple transmitters may transmit their pilots using time division multiplexing (TDM), code division multiplexing (CDM), interleaved frequency division multiplexing (IFDM), or localized frequency division multiplexing (LFDM). The pilots from these transmitters are then orthogonal to one another. A receiver performs the complementary demultiplexing for the pilots sent by the transmitters. The receiver may derive a channel estimate for each transmitter using an MMSE technique or a least-squares technique. The receiver may receive overlapping data transmissions sent on the same time-frequency block by the multiple transmitters and may perform receiver spatial processing with spatial filter matrices to separate these data transmissions. The receiver may derive the spatial filter matrices based on the channel estimates for the transmitters and using zero-forcing, MMSE, or maximal ratio combining technique.

摘要翻译： 在采用交织FDMA（IFDMA）或集中式FDMA的单载波频分多址（SC-FDMA）系统中，多个发射机可以使用时分多路复用（TDM），码分多路复用（CDM），交错分频 复用（IFDM）或局部频分复用（LFDM）。 来自这些发射机的飞行员然后彼此正交。 接收机对由发射机发送的导频进行互补解复用。 接收机可以使用MMSE技术或最小二乘法来为每个发射机导出信道估计。 接收机可以接收由多个发射机在相同时间频率块上发送的重叠数据传输，并且可以利用空间滤波器矩阵来执行接收机空间处理以分离这些数据传输。 接收机可以基于发射机的信道估计和使用零强制，MMSE或最大比组合技术导出空间滤波器矩阵。

公开(公告)号：US20070014272A1

公开(公告)日：2007-01-18

申请号：US11242115

申请日：2005-09-30

申请人： Ravi Palanki ,  Aamod Khandekar ,  Arak Sutivong

发明人： Ravi Palanki ,  Aamod Khandekar ,  Arak Sutivong

IPC分类号： H04B7/208

CPC分类号： H04B7/04 ,  H04L1/1819 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0206 ,  H04L25/022 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0256

摘要： In a single-carrier frequency division multiple access (SC-FDMA) system that utilizes interleaved FDMA (IFDMA) or localized FDMA, multiple transmitters may transmit their pilots using time division multiplexing (TDM), code division multiplexing (CDM), interleaved frequency division multiplexing (IFDM), or localized frequency division multiplexing (LFDM). The pilots from these transmitters are then orthogonal to one another. A receiver performs the complementary demultiplexing for the pilots sent by the transmitters. The receiver may derive a channel estimate for each transmitter using an MMSE technique or a least-squares technique. The receiver may receive overlapping data transmissions sent on the same time-frequency block by the multiple transmitters and may perform receiver spatial processing with spatial filter matrices to separate these data transmissions. The receiver may derive the spatial filter matrices based on the channel estimates for the transmitters and using zero-forcing, MMSE, or maximal ratio combining technique.

摘要翻译： 在采用交织FDMA（IFDMA）或集中式FDMA的单载波频分多址（SC-FDMA）系统中，多个发射机可以使用时分多路复用（TDM），码分多路复用（CDM），交错分频 复用（IFDM）或局部频分复用（LFDM）。 来自这些发射机的飞行员然后彼此正交。 接收机对由发射机发送的导频进行互补解复用。 接收机可以使用MMSE技术或最小二乘法来为每个发射机导出信道估计。 接收机可以接收由多个发射机在相同时间频率块上发送的重叠数据传输，并且可以使用空间滤波器矩阵来执行接收机空间处理以分离这些数据传输。 接收机可以基于发射机的信道估计和使用零强制，MMSE或最大比组合技术导出空间滤波器矩阵。

公开(公告)号：US08885628B2

公开(公告)日：2014-11-11

申请号：US11431969

申请日：2006-05-10

申请人： Ravi Palanki ,  Aamod Khandekar ,  Arak Sutivong

发明人： Ravi Palanki ,  Aamod Khandekar ,  Arak Sutivong

IPC分类号： H04B7/216 ,  H04J4/00 ,  H04B7/00 ,  H04L5/00 ,  H04B1/692 ,  H04J11/00 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26

CPC分类号： H04W72/0406 ,  H04B1/692 ,  H04J1/00 ,  H04J11/00 ,  H04J13/10 ,  H04L5/0021 ,  H04L5/0026 ,  H04L5/0037 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0242 ,  H04L25/03866 ,  H04L27/2613 ,  H04L27/2615 ,  H04L27/2636 ,  H04L27/2643

摘要： In a single-carrier frequency division multiple access (SC-FDMA) system that utilizes interleaved FDMA (IFDMA) or localized FDMA (LFDMA), a transmitter generates modulation symbols for different types of data (e.g., traffic data, signaling, and pilot) and performs code division multiplexing (CDM) on at least one data type. For example, the transmitter may apply CDM on signaling and/or pilot sent on frequency subbands and symbol periods that are also used by at least one other transmitter. To apply CDM to a given data type (e.g., signaling), the transmitter performs spreading on the modulation symbols for that data type with an assigned spreading code. CDM may be applied across symbols, samples, samples and symbols, frequency subbands, and so on. The transmitter may perform scrambling after the spreading. The transmitter generates SC-FDMA symbols of the same or different symbol durations for traffic data, signaling, and pilot and transmits the SC-FDMA symbols.

摘要翻译： 在采用交织FDMA（IFDMA）或局部FDMA（LFDMA）的单载波频分多址（SC-FDMA）系统中，发射机为不同类型的数据（例如业务数据，信令和导频）生成调制符号， 并对至少一种数据类型进行码分复用（CDM）。 例如，发射机可以在也被至少一个其他发射机使用的频率子带和符号周期上发送的信令和/或导频上应用CDM。 为了将CDM应用于给定数据类型（例如，信令），发射机对具有分配的扩展码的数据类型的调制符号执行扩展。 CDM可以跨符号，样本，样本和符号，频率子带等应用。 发射机可以在扩频之后执行加扰。 发射机产生业务数据，信令和导频的相同或不同符号持续时间的SC-FDMA符号，并发送SC-FDMA符号。

公开(公告)号：US20070041404A1

公开(公告)日：2007-02-22

申请号：US11431969

申请日：2006-05-10

申请人： Ravi Palanki ,  Aamod Khandekar ,  Arak Sutivong

发明人： Ravi Palanki ,  Aamod Khandekar ,  Arak Sutivong

IPC分类号： H04J13/00 ,  H04J1/00

CPC分类号： H04W72/0406 ,  H04B1/692 ,  H04J1/00 ,  H04J11/00 ,  H04J13/10 ,  H04L5/0021 ,  H04L5/0026 ,  H04L5/0037 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0242 ,  H04L25/03866 ,  H04L27/2613 ,  H04L27/2615 ,  H04L27/2636 ,  H04L27/2643

摘要： In a single-carrier frequency division multiple access (SC-FDMA) system that utilizes interleaved FDMA (IFDMA) or localized FDMA (LFDMA), a transmitter generates modulation symbols for different types of data (e.g., traffic data, signaling, and pilot) and performs code division multiplexing (CDM) on at least one data type. For example, the transmitter may apply CDM on signaling and/or pilot sent on frequency subbands and symbol periods that are also used by at least one other transmitter. To apply CDM to a given data type (e.g., signaling), the transmitter performs spreading on the modulation symbols for that data type with an assigned spreading code. CDM may be applied across symbols, samples, samples and symbols, frequency subbands, and so on. The transmitter may perform scrambling after the spreading. The transmitter generates SC-FDMA symbols of the same or different symbol durations for traffic data, signaling, and pilot and transmits the SC-FDMA symbols.

摘要翻译： 在采用交织FDMA（IFDMA）或局部FDMA（LFDMA）的单载波频分多址（SC-FDMA）系统中，发射机为不同类型的数据（例如业务数据，信令和导频）生成调制符号， 并对至少一种数据类型进行码分复用（CDM）。 例如，发射机可以在也被至少一个其他发射机使用的频率子带和符号周期上发送的信令和/或导频上应用CDM。 为了将CDM应用于给定数据类型（例如，信令），发射机对具有分配的扩展码的数据类型的调制符号执行扩展。 CDM可以跨符号，样本，样本和符号，频率子带等应用。 发射机可以在扩频之后执行加扰。 发射机产生业务数据，信令和导频的相同或不同符号持续时间的SC-FDMA符号，并发送SC-FDMA符号。

公开(公告)号：US09264976B2

公开(公告)日：2016-02-16

申请号：US12260856

申请日：2008-10-29

申请人： Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan ,  Ravi Palanki ,  Ashwin Sampath ,  Avneesh Agrawal

发明人： Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan ,  Ravi Palanki ,  Ashwin Sampath ,  Avneesh Agrawal

IPC分类号： H04W48/08

CPC分类号： H04W48/08

摘要： Providing for management of wireless communications in a heterogeneous wireless access point (AP) environment is described herein. By way of example, system data of an over-the-air message can be configured to include information identifying a distinct type of transmitting base station. In some aspects, the information can include an access type of the base station and/or a sector ID for distinguishing the base station among large numbers of other base stations. According to other aspects, the information can include wireless channel resources designated for a particular type of base station, or blanked by the transmitting base station, to facilitate interference reduction on such resources. By employing aspects of wireless communication management disclosed herein, efficient and reliable communication can be affected in large heterogeneous AP networks.

摘要翻译： 本文描述了在异构无线接入点（AP）环境中的无线通信的管理。 作为示例，空中消息的系统数据可以被配置为包括标识不同类型的发送基站的信息。 在一些方面，信息可以包括基站的接入类型和/或用于区分大量其他基站中的基站的扇区ID。 根据其他方面，信息可以包括为特定类型的基站指定的无线信道资源，或者由发射基站消隐，以便于对这些资源进行干扰减少。 通过采用这里公开的无线通信管理的方面，可以在大型异构AP网络中影响高效可靠的通信。

公开(公告)号：US08849316B2

公开(公告)日：2014-09-30

申请号：US12198833

申请日：2008-08-26

申请人： Gavin B. Horn ,  Avneesh Agrawal ,  Ashwin Sampath ,  Alexei Gorokhov ,  Naga Bhushan ,  Rajarshi Gupta ,  Fatih Ulupinar ,  Parag A. Agashe ,  Rajat Prakash ,  Aamod Khandekar ,  Ravi Palanki

发明人： Gavin B. Horn ,  Avneesh Agrawal ,  Ashwin Sampath ,  Alexei Gorokhov ,  Naga Bhushan ,  Rajarshi Gupta ,  Fatih Ulupinar ,  Parag A. Agashe ,  Rajat Prakash ,  Aamod Khandekar ,  Ravi Palanki

IPC分类号： H04W68/00 ,  H04W48/08

CPC分类号： H04W48/08 ,  H04W68/00

摘要： Signaling-only access may be established with an access node under certain circumstances such as, for example, upon determining that a node is not authorized for data access at the access node. A node that is not authorized for data access at an access node may still be paged by the access node through the use of signaling-only access. In this way, transmissions by the access node may not interfere with the reception of pages at the node. A first node may be selected for providing paging while a second node is selected for access under certain circumstances such as, for example, upon determining that the second node provides more desirable service than the first node.

摘要翻译： 在某些情况下，例如在确定节点未被授权用于访问节点处的数据访问时，可以与接入节点建立仅信令访问。 在访问节点处未被授权用于数据访问的节点仍然可以由接入节点通过使用仅信令接入进行寻呼。 以这种方式，接入节点的传输可能不干扰节点处的页面的接收。 可以选择第一节点来提供寻呼，而在某些情况下例如在确定第二节点提供比第一节点更理想的服务时，第二节点被选择用于接入。

公开(公告)号：US08843069B2

公开(公告)日：2014-09-23

申请号：US12262013

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： H04W28/00 ,  H04W52/24 ,  H04B17/00 ,  H04B7/06

CPC分类号： H04W52/243 ,  H04B7/0617 ,  H04B17/382 ,  H04W52/247

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 send a first message to at least one interfering station to request reduction of interference on at least one resource. The first station may send the first message in anticipation of receiving data on the at least one resource. An interfering station may receive the first message from the first station and may reduce interference on the at least one resource by reducing its transmit power and/or by steering its power in a direction different from the first station. The first station may thereafter receive data from a second station on the at least one resource. The techniques may be used for data transmission on the forward and reverse links.

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）可以向至少一个干扰站发送第一消息，以请求减少对至少一个资源的干扰。 第一站可以发送第一消息以预期在至少一个资源上接收数据。 干扰站可以从第一站接收第一消息，并且可以通过减少其发射功率和/或通过在与第一站不同的方向上转向其功率来减少对至少一个资源的干扰。 此后，第一站可以在至少一个资源上从第二站接收数据。 这些技术可以用于前向和反向链路上的数据传输。

公开(公告)号：US08693444B2

公开(公告)日：2014-04-08

申请号：US13465943

申请日：2012-05-07

申请人： Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan ,  Sandip Sarkar ,  Ravi Palanki

发明人： Aamod Khandekar ,  Alexei Gorokhov ,  Naga Bhushan ,  Sandip Sarkar ,  Ravi Palanki

IPC分类号： H04B7/216 ,  H04W72/04 ,  H04B1/713 ,  H04W72/08 ,  H04L5/00 ,  H04B7/26

CPC分类号： H04W72/04 ,  H04B1/713 ,  H04B7/2621 ,  H04L1/1692 ,  H04L5/0053 ,  H04W52/146 ,  H04W52/16 ,  H04W52/243 ,  H04W52/247 ,  H04W52/362 ,  H04W52/60 ,  H04W72/08

摘要： Techniques for sending control information in a wireless communication system are described. A control segment may include L≧1 tiles, and each tile may include a number of transmission units. A number of control resources may be defined and mapped to the transmission units for the control segment. For symmetric mapping, multiple sets of S≧1 control resources may be formed, and each batch of L consecutive sets of S control resources may be mapped to S transmission units at the same location in the L tiles. For localized mapping, S>1, and each set of S control resources may be mapped to a cluster of S adjacent transmission units in one tile. For distributed mapping, S=1, and each control resource may be mapped to one transmission unit in one tile. For diversity, each control resource may be mapped to multiple (e.g., three) transmission units in at least one tile.