公开(公告)号：US20070091786A1

公开(公告)日：2007-04-26

申请号：US11256629

申请日：2005-10-21

Applicant: Shupeng Li ,  Sudhir Ramakrishna ,  Ashok Rudrapatna

Inventor： Shupeng Li ,  Sudhir Ramakrishna ,  Ashok Rudrapatna

IPC: H04J9/00

CPC classification number: H04B1/707 ,  H04B1/692 ,  H04J13/16

Abstract: The present invention provides a method and an apparatus for a wireless communication between at least one mobile station and a base station in a cellular system. The method comprises providing a desired spreading in time and frequency domains to transmit data using at least two carriers in a transmission on an uplink to the base station. Either the base station may provide an indication to the mobile station to enable the desired spreading, or alternatively, the mobile station may request it. A spread-spectrum cellular system may enable a mobile station to provide a two-dimensional spreading, which distributes spreading in time and frequency directions. A single two-dimensional spreading code or at least two one-dimensional spreading codes may provide a two-dimensional spreading. In this way, in an uplink transmission using a multi-carrier, code division multiple access (MC-CDMA) protocol, by varying the data portions being spread in time and frequency domains a joint spreading may result. The joint spreading may distribute spreading codes in the time and frequency directions to distribute the spreading in a transmission. When using the MC-CDMA protocol, a mobile station may select one or more spreading formats in an uplink transmission that may increase the success rate of the packet transmission. Moreover, use of a particular spreading format in a flexible manner may reduce the packet delay and suppress intra-cell interference.

Abstract translation: 本发明提供一种用于在蜂窝系统中的至少一个移动台与基站之间的无线通信的方法和装置。 该方法包括在时基和频域中提供期望的扩展，以便在到基站的上行链路上的传输中使用至少两个载波来发送数据。 基站可以向移动台提供指示以实现期望的扩展，或者替代地，移动台可以请求它。 扩频蜂窝系统可以使移动台能够提供二维扩展，其在时间和频率方向上分布扩展。 单个二维扩展码或至少两个一维扩展码可以提供二维扩展。 以这种方式，在使用多载波，码分多址（MC-CDMA）协议的上行链路传输中，通过改变在时域和频域上扩展的数据部分，可能导致联合扩频。 联合扩展可以在时间和频率方向上分布扩展码，以在传输中分布扩展。 当使用MC-CDMA协议时，移动台可以在可能增加分组传输的成功率的上行链路传输中选择一个或多个扩展格式。 此外，以灵活的方式使用特定的扩展格式可以减少分组延迟并抑制小区内干扰。

公开(公告)号：US20060203793A1

公开(公告)日：2006-09-14

申请号：US11076288

申请日：2005-03-09

Applicant: Shupeng Li ,  Lawrence Ozarow ,  Sudhir Ramakrishna ,  Ashok Rudrapatna

Inventor： Shupeng Li ,  Lawrence Ozarow ,  Sudhir Ramakrishna ,  Ashok Rudrapatna

IPC: H04J1/00

CPC classification number: H04L5/023

Abstract: A method is provided for controlling communications between a base station and a mobile device. The method comprises transmitting information between the base station and the mobile device over a plurality of sub-channels where each sub-channel has a different carrier frequency. A first portion of the sub-channels are used for legacy mobile devices, and a second portion of the sub-channels is used by new mobile devices.

Abstract translation: 提供了一种用于控制基站和移动设备之间的通信的方法。 该方法包括在每个子信道具有不同载波频率的多个子信道上在基站和移动设备之间传送信息。 子信道的第一部分用于传统移动设备，并且新的移动设备使用子信道的第二部分。

公开(公告)号：US20060199577A1

公开(公告)日：2006-09-07

申请号：US11070437

申请日：2005-03-02

Applicant: Sudhir Ramakrishna ,  Ashok Rudrapatna

Inventor： Sudhir Ramakrishna ,  Ashok Rudrapatna

IPC: H04Q7/20

CPC classification number: H04B1/707 ,  H04B7/0632 ,  H04B2201/70701 ,  H04L1/0002

Abstract: A method enables the use of a secondary pilot signal and a secondary antenna(s) in the forward link of a CDMA-based cellular network employing a slotted transmission scheme with a time-multiplexed primary pilot signal, with backwards compatibility. The forward link is divided into a number of time slots. For communications with “legacy” mobile stations that expect transmissions from a single, primary antenna (and that expect a single, primary pilot signal), during some of the time slots, only the primary antenna is used for transmissions, including transmitting the primary pilot signal. Neither the secondary pilot channel nor any other signals from the secondary antenna are transmitted. During the remaining time slots: (i) the primary pilot signal is transmitted from the primary antenna, and the secondary pilot signal is transmitted from the secondary antenna, but at different times; and (ii) data meant for the legacy mobile stations is not transmitted.

Abstract translation: 一种方法使得能够使用具有后向兼容性的采用具有时间复用的主导频信号的时隙传输方案的基于CDMA的蜂窝网络的前向链路中的次级导频信号和次级天线。 前向链路分为多个时隙。 为了与期望来自单个主要天线（并且期望单个主要导频信号）的传输的“传统”移动站的通信，在一些时隙期间，仅将主天线用于传输，包括传送主导频 信号。 二次导频信道也不发送来自次天线的任何其它信号。 在剩下的时隙中：（i）主导频信号从主天线发射，次导频信号从次天线发射，但在不同时间发射; 并且（ii）不传输用于传统移动台的数据。

公开(公告)号：US06891852B1

公开(公告)日：2005-05-10

申请号：US09288006

申请日：1999-04-08

Applicant: Joseph E. Cloutier ,  Wen-Yi Kuo ,  Sudhir Ramakrishna

Inventor： Joseph E. Cloutier ,  Wen-Yi Kuo ,  Sudhir Ramakrishna

IPC: H04L12/56 ,  H04L29/08 ,  H04M11/00 ,  H04W12/10 ,  H04W24/00 ,  H04W76/06 ,  H04J3/16 ,  H04J3/24 ,  H04J3/00 ,  H04B7/212 ,  H04L12/43

CPC classification number: H04W76/25 ,  H04W24/00

Abstract: A method to adjust the burst transmission duration time, in a high speed digital wireless communication system, to provide sufficient time for the transmission of data when all the data is not available at the time of transmission. According to the method of the invention, after the burst transmission is begun, the burst is maintained active as additional data is selected within a known time period following the previous detected data packet and the detected data is appended to the active burst transmission. The invention further terminates the burst duration when no additional data is detected within the redefined time period following the previous detected data packet.

Abstract translation: 一种在高速数字无线通信系统中调整突发传输持续时间的方法，以便在传输时所有数据都不可用时为数据传输提供足够的时间。 根据本发明的方法，在突发传输开始之后，随着在先前检测到的数据分组之后的已知时间周期内选择附加数据，并且将检测到的数据附加到主动突发传输，突发被保持活动。 当在先前检测到的数据分组之后的重新定义的时间段内没有检测到附加数据时，本发明还终止了突发持续时间。

公开(公告)号：US09100227B2

公开(公告)日：2015-08-04

申请号：US13597073

申请日：2012-08-28

Applicant: Jaspreet Singh ,  Sudhir Ramakrishna

Inventor： Jaspreet Singh ,  Sudhir Ramakrishna

IPC: H04L27/06 ,  H04L25/02 ,  H03D1/00 ,  H04L27/26

CPC classification number: H04L25/0212 ,  H04L25/0222 ,  H04L25/0224 ,  H04L27/2647

Abstract: Channel time and frequency correlations are determined from OFDM symbols and subframes using appropriately scaled sums of the products of the received pilot symbols at predetermined intervals n in time and/or frequency of resource elements within the resource blocks of the subframes. The correlation estimates may optionally be improved using pilot symbols for a plurality of antennas and for a plurality of pilot signal ports, and across a plurality of subframes. The calculated channel time and frequency correlations may be employed to improve estimates of channel characteristics for purposes such as selection of a transmission mode between a base station and a user equipment on the channel or for the purpose of channel equalization and data demodulation.

Abstract translation: 使用在子帧的资源块内的资源元素的时间和/或频率上以预定间隔n的接收导频符号的乘积的适当缩放和来从OFDM符号和子帧确定信道时间和频率相关。 可以可选地使用用于多个天线和多个导频信号端口以及跨越多个子帧的导频符号来改进相关估计。 可以采用所计算的信道时间和频率相关性来改善信道特性的估计，例如在信道上选择基站和用户设备之间的传输模式，或者用于信道均衡和数据解调的目的。

公开(公告)号：US20100246515A1

公开(公告)日：2010-09-30

申请号：US12722425

申请日：2010-03-11

Applicant: Jiann-An TSAI ,  Zhouyue PI ,  Kaushik JOSIAM ,  Farooq KHAN ,  Sudhir RAMAKRISHNA

Inventor： Jiann-An TSAI ,  Zhouyue PI ,  Kaushik JOSIAM ,  Farooq KHAN ,  Sudhir RAMAKRISHNA

IPC: H04W72/04 ,  H04L27/28

CPC classification number: H04L5/0051 ,  H04L1/1819 ,  H04L5/0007 ,  H04L5/005 ,  H04L5/0073 ,  H04L25/0224

Abstract: A method and base station apparatus for transmitting pilot data in a wireless communication system, and a method and mobile station apparatus for receiving pilot data in a wireless communication system are provided. The method for transmitting pilot data in a wireless communication system includes determining a pilot pattern in at least one resource block for each of one or more pilot streams, and transmitting the one or more pilot streams based on the determined respective pilot pattern in the at least one resource block, wherein the at least one resource block comprises a plurality of subcarriers and a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols.

Abstract translation: 一种用于在无线通信系统中发送导频数据的方法和基站装置，以及用于在无线通信系统中接收导频数据的方法和移动站装置。 用于在无线通信系统中发送导频数据的方法包括：针对一个或多个导频流中的每一个确定至少一个资源块中的导频模式，以及至少基于所确定的相应导频模式来发送所述一个或多个导频流 一个资源块，其中所述至少一个资源块包括多个子载波和多个正交频分复用（OFDM）符号。

公开(公告)号：US06453151B1

公开(公告)日：2002-09-17

申请号：US09336921

申请日：1999-06-21

Applicant: T. Roger Kiang ,  Tejaskumar R. Patel ,  Sudhir Ramakrishna

Inventor： T. Roger Kiang ,  Tejaskumar R. Patel ,  Sudhir Ramakrishna

IPC: H04B726

CPC classification number: H04L1/0027 ,  H04B17/24 ,  H04B17/309 ,  H04L1/0002 ,  H04L1/0026 ,  H04W24/10 ,  H04W28/06 ,  H04W28/18 ,  H04W52/24 ,  H04W72/04 ,  H04W88/12

Abstract: A method is described to reduce the time required to assign the burst transmission parameters in a wireless communication system by autonomously sharing transmission and reception information among the components of the network. Information is autonomously provided from a remote subnetwork element to a controlling network element so the controlling network element may use the information to dynamically assign and update burst transmission parameters.

Abstract translation: 描述了一种方法，以通过在网络的组件中自主共享发送和接收信息来减少在无线通信系统中分配突发传输参数所需的时间。 信息从远程子网元件自主地提供给控制网元，从而控制网元可以使用该信息来动态分配和更新突发传输参数。

公开(公告)号：US09106375B2

公开(公告)日：2015-08-11

申请号：US12776156

申请日：2010-05-07

Applicant: Sudhir Ramakrishna ,  Kaushik Josiam

Inventor： Sudhir Ramakrishna ,  Kaushik Josiam

IPC: H04L1/00 ,  H04L5/00

CPC classification number: H04L1/0038 ,  H04L1/00 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0092 ,  H04L2001/0093

Abstract: A base station and subscriber station are capable of communicating with each other in a wireless communication network. The base station allocates resources to the subscriber station through resource allocation messages included in a resource allocation region of a downlink communication. The resource allocation region is partitioned into a plurality of sub-regions. Conventions regarding the arrangement of the resource allocation messages are disclosed which enable the subscriber station to decode the resource allocation messages contained in a sub-region and cease decoding operations upon reaching the end of the sub-region. Accordingly, the subscriber station does not decode resource allocation messages contained in subsequent sub-regions.

Abstract translation: 基站和用户台能够在无线通信网络中相互通信。 基站通过包括在下行链路通信的资源分配区域中的资源分配消息向用户站分配资源。 资源分配区域被划分为多个子区域。 公开了关于资源分配消息的布置的约定，其使订户站能够解码包含在子区域中的资源分配消息，并且在到达子区域的结束时停止解码操作。 因此，用户站不对包含在后续子区域中的资源分配消息进行解码。

公开(公告)号：US08767642B2

公开(公告)日：2014-07-01

申请号：US12953306

申请日：2010-11-23

Applicant: Sudhir Ramakrishna

Inventor： Sudhir Ramakrishna

IPC: H04W4/00 ,  H04W72/00

CPC classification number: H04W72/042 ,  H04L5/0023 ,  H04L5/0094

Abstract: For use in a wireless network, a base station configured to communicate in the wireless network is provided. The base station includes a processor coupled to a transmitter and configured to generate a resource allocation message. The resource allocation message includes a plurality of fixed length fields, one or more primary variable-length fields, and a plurality of secondary variable-length fields. The one or more primary variable-length fields occupy a position in the resource allocation message preceding as many of the fixed length fields as permitted by rules that govern a structure of the resource allocation message. The one or more primary variable-length fields are positioned in the resource allocation message such that when the resource allocation message is partitioned and allocated across a sequence of basic units (BUs), every primary variable-length field appears in a smallest possible sequence of BUs starting from the first BU in the sequence.

Abstract translation: 为了在无线网络中使用，提供了被配置为在无线网络中进行通信的基站。 基站包括耦合到发射机并被配置为生成资源分配消息的处理器。 资源分配消息包括多个固定长度字段，一个或多个主可变长度字段和多个次可变长度字段。 一个或多个主可变长度字段在资源分配消息中占据许多固定长度字段的位置，如由管理资源分配消息的结构的规则允许的那样。 一个或多个主可变长度字段位于资源分配消息中，使得当资源分配消息在一系列基本单元（BU）上被划分和分配时，每个主可变长度字段以最小可能的顺序出现 BU从序列中的第一个BU开始。

公开(公告)号：US20130051489A1

公开(公告)日：2013-02-28

申请号：US13597073

申请日：2012-08-28

Applicant: Jaspreet Singh ,  Sudhir Ramakrishna

Inventor： Jaspreet Singh ,  Sudhir Ramakrishna

IPC: H04L27/06 ,  H04L27/00

CPC classification number: H04L25/0212 ,  H04L25/0222 ,  H04L25/0224 ,  H04L27/2647

Abstract: Channel time and frequency correlations are determined from OFDM symbols and subframes using appropriately scaled sums of the products of the received pilot symbols at predetermined intervals n in time and/or frequency of resource elements within the resource blocks of the subframes. The correlation estimates may optionally be improved using pilot symbols for a plurality of antennas and for a plurality of pilot signal ports, and across a plurality of subframes. The calculated channel time and frequency correlations may be employed to improve estimates of channel characteristics for purposes such as selection of a transmission mode between a base station and a user equipment on the channel or for the purpose of channel equalization and data demodulation.

Abstract translation: 使用在子帧的资源块内的资源元素的时间和/或频率上以预定间隔n的接收导频符号的乘积的适当缩放和来从OFDM符号和子帧确定信道时间和频率相关。 可以可选地使用用于多个天线和多个导频信号端口以及跨越多个子帧的导频符号来改进相关估计。 可以采用所计算的信道时间和频率相关性来改善信道特性的估计，例如在信道上选择基站和用户设备之间的传输模式，或者用于信道均衡和数据解调的目的。