公开(公告)号：US20060111149A1

公开(公告)日：2006-05-25

申请号：US11315452

申请日：2005-12-22

Applicant: Prabhakar Chitrapu ,  Steven Goldberg

Inventor： Prabhakar Chitrapu ,  Steven Goldberg

IPC: H04Q7/20

CPC classification number: H04W16/28 ,  H01Q1/246 ,  H01Q3/2605 ,  H04W36/00 ,  H04W36/32 ,  H04W64/00 ,  H04W88/08

Abstract: The present invention relates to a method and system using dynamic beam forming for wireless communication signals in a wireless network. Base stations and/or UEs are provided with antenna systems having a range of beam forming selections. Relative base station and UE locations are one type of criteria used to make beam forming decisions.

公开(公告)号：US20060072520A1

公开(公告)日：2006-04-06

申请号：US09814788

申请日：2001-03-22

Applicant: Prabhakar Chitrapu ,  Robert Stack ,  Philip Farnum

Inventor： Prabhakar Chitrapu ,  Robert Stack ,  Philip Farnum

IPC: H04B7/212

CPC classification number: H04B7/2656 ,  H04B7/2125

Abstract: Improved throughput is provided in a spacecraft TDMA cellular communications system by introducing a standby state, in addition to the idle and transfer states, of the medium access control (MAC) protocol, which controls the transfer of data over the radio interface between the network and the user terminals. The terrestrial locations include mobile user terminals and gateways which provide connections to the land line telephone system and/or the land packet data network i.e. Internet service provider. Each of the terrestrial terminals and gateways include a MAC to control the transmitting and receiving of data between the gateway and user terminals. Since packet data is bursty, multiple transitions occur between the idle and transfer states during data transfers. The new standby state maintains synchronization, reducing the transition time to the data transfer state by comparison with the transition time from an idle state where the network does not maintain user synchronization.

Abstract translation: 通过引入介质访问控制（MAC）协议的空闲和传送状态之外的备用状态以及控制通过无线电接口在网络和 用户终端。 地面位置包括提供到陆线电话系统和/或陆地分组数据网络即互联网服务提供商的连接的移动用户终端和网关。 每个地面终端和网关都包括一个MAC，用于控制网关和用户终端之间数据的发送和接收。 由于分组数据是突发的，在数据​​传输期间，在空闲和传输状态之间会发生多次转换。 新的待机状态保持同步，与从网络不维护用户同步的空闲状态的转换时间相比，减少了到数据传输状态的转换时间。

公开(公告)号：US20060025118A1

公开(公告)日：2006-02-02

申请号：US11214111

申请日：2005-08-29

Applicant: Prabhakar Chitrapu ,  John Kaewell

Inventor： Prabhakar Chitrapu ,  John Kaewell

IPC: H04Q7/20

CPC classification number: H04M3/436 ,  H04M1/72569 ,  H04M1/72572 ,  H04M3/4211 ,  H04M2203/4536 ,  H04M2242/14

Abstract: A method for controlling the communications of a wireless transmit/receive unit (WTRU) in a wireless network using presence and situation information begins by generating presence and situation information pertaining to the WTRU. The presence and situation data is stored and, subsequently, retrieved upon receipt of a communication at the WTRU. The communication settings of the WTRU are adjusted by using the presence and situation information.

Abstract translation: 使用存在和情况信息来控制无线网络中的无线发射/接收单元（WTRU）的通信的方法通过产生与WTRU有关的存在和状况信息开始。 存在和情况数据被存储，并且随后在WTRU接收到通信时被检索。 通过使用存在和情况信息来调整WTRU的通信设置。

公开(公告)号：US20050195758A1

公开(公告)日：2005-09-08

申请号：US11072703

申请日：2005-03-04

Applicant: Prabhakar Chitrapu

Inventor： Prabhakar Chitrapu

IPC: H04B7/14

CPC classification number: H04L5/14 ,  H04B7/2615 ,  H04B7/2618 ,  H04L27/2601 ,  H04L47/17 ,  H04W72/0453 ,  H04W74/004 ,  H04W74/006 ,  H04W88/08

Abstract: The invention involves utilizing pieces of disjoint spectral blocks. In one embodiment, a frequency division duplex approach is used, where each spectral block is utilized solely for either uplink or downlink communications. In another embodiment, a time division duplex approach is used, where each spectral block is time divided and uplink and downlink communications are assigned to different time slots within the same spectral blocks. In another embodiment, a code division duplex approach is utilized, where uplink and downlink communications are assigned different codes/hopping patterns within a same spectral block.

Abstract translation: 本发明涉及利用不相交的光谱块的片段。 在一个实施例中，使用频分双工方法，其中每个频谱块仅用于上行链路或下行链路通信。 在另一个实施例中，使用时分双工方法，其中每个频谱块被分时，并且将上行链路和下行链路通信分配给相同频谱块内的不同时隙。 在另一个实施例中，利用码分双工方法，其中上行链路和下行链路通信被分配在同一频谱块内的不同的码/跳频模式。

公开(公告)号：US20050007984A1

公开(公告)日：2005-01-13

申请号：US10836037

申请日：2004-04-30

Applicant: Kamel Shaheen ,  Prabhakar Chitrapu ,  Brian Kiernan

Inventor： Kamel Shaheen ,  Prabhakar Chitrapu ,  Brian Kiernan

IPC: H04J1/16 ,  H04J3/14 ,  H04L20060101 ,  H04L12/28 ,  H04L12/56 ,  H04L12/64 ,  H04L29/06 ,  H04L29/10 ,  H04W4/12 ,  H04W80/00 ,  H04W88/16 ,  H04W92/24

CPC classification number: H04W88/16 ,  H04L65/1016 ,  H04W4/12 ,  H04W80/00 ,  H04W92/24

Abstract: A method and architecture for accessing an IMS over WLANs/WWANs generally, and more particularly over WLANs/WWANs viewed in light of existing related standards is disclosed. More specifically, the invention provides new interfaces enabling IMS access over WLANs/WWANs, and an exemplary method and architecture for such an interface.

Abstract translation: 公开了一种通过WLAN / WWAN访问IMS的方法和体系结构，并且更具体地涉及根据现有相关标准查看的WLAN / WWAN。 更具体地，本发明提供了能够通过WLAN / WWAN进行IMS接入的新接口，以及用于这种接口的示例性方法和体系结构。

公开(公告)号：US5604793A

公开(公告)日：1997-02-18

申请号：US511060

申请日：1995-08-03

Applicant: Prabhakar Chitrapu ,  Wei Lin

Inventor： Prabhakar Chitrapu ,  Wei Lin

IPC: H04M3/56 ,  H04M9/08 ,  H04Q1/457 ,  H04M1/00

CPC classification number: H04M3/56 ,  H04M3/568 ,  H04M9/08 ,  H04Q1/4575

Abstract: A tone blocking system for use preferably in conferencing systems in order to prevent control tones from being transmitted to other conferees is disclosed. The buffer length used to process the signal and detect tones is varied, being increased when a tone is suspected to allow for sophisticated tone detection algorithms, and being decreased when silence is present by trimming the silence away. The technique minimizes delay, and its degrading effect on echo, but nonetheless provides for a lengthy buffer required to do reliable tone detection. The invention is applicable to any signal other than tone as well.

Abstract translation: 公开了一种用于优选在会议系统中使用以防止控制音被传送给其他与会者的音调阻塞系统。 用于处理信号和检测音调的缓冲器长度是变化的，当怀疑音调允许复杂的音调检测算法时增加，并且当通过修剪静音而存在沉默时减小。 该技术最大限度地减少了延迟，并降低了对回声的影响，但仍然提供了执行可靠音调检测所需的冗长缓冲区。 本发明也适用于除音调以外的任何信号。

公开(公告)号：US20080090563A1

公开(公告)日：2008-04-17

申请号：US11999353

申请日：2007-12-05

Applicant: Prabhakar Chitrapu

Inventor： Prabhakar Chitrapu

IPC: H04M3/42 ,  H04M1/00 ,  H04Q7/20 ,  H04Q7/22

CPC classification number: G01S5/0252 ,  G01S5/02 ,  G01S5/0294 ,  G01S5/14 ,  H04L67/04 ,  H04L67/16 ,  H04L67/18 ,  H04L69/329 ,  H04W16/18 ,  H04W28/26 ,  H04W48/16 ,  H04W48/20 ,  H04W64/00 ,  H04W76/10 ,  H04W88/02 ,  H04W88/08

Abstract: Classes of cognition models which may include: 1) Radio Environment models, 2) Mobility models and 3) Application/User Context models are utilized in a wireless communications network. Radio Environment models represent the physical aspects of the radio environment, such as shadowing losses, multi-path propagation, interference and noise levels, etc. Mobility models represent users motion, in terms of geo-coordinates and/or logical identifiers, such as street names etc. as well as speed of user terminal etc. The context model represents the present state and dynamics of each of these application processes within itself and between multiple application processes. These data are employed to optimize network performance.

Abstract translation: 认知模型类可能包括：1）无线电环境模型，2）移动模型和3）无线通信网络中使用应用/用户上下文模型。 无线电环境模型表示无线电环境的物理方面，例如阴影丢失，多径传播，干扰和噪声水平等。移动模型表示用户在地理坐标和/或逻辑标识符（例如街道）方面的运动 名称等以及用户终端的速度等。上下文模型表示其本身和多个应用进程之间的这些应用进程中的每一个的当前状态和动态。 这些数据用于优化网络性能。

公开(公告)号：US20070297533A1

公开(公告)日：2007-12-27

申请号：US11765697

申请日：2007-06-20

Applicant: Prabhakar Chitrapu ,  Paul Russell

Inventor： Prabhakar Chitrapu ,  Paul Russell

IPC: H04L27/20

CPC classification number: H04L27/3488 ,  H04L27/183 ,  H04L2001/0098

Abstract: The present invention relates to hierarchical modulation (HM) and demodulation for global system for mobile communications (GSM)/enhanced data rates for GSM evolution (EDGE) radio access network (GERAN) evolution. In one embodiment, HM symbols are generated by generating primary modulated symbols based on a first bit group, generating secondary modulated symbols based on a second bit group, and combining the primary modulated symbols and the secondary modulated symbols. In another embodiment, the HM symbols are demodulated. In yet another embodiment, a received GERAN signal is converted to baseband complex symbol values, which are processed to produce training symbols and data symbols that carry pilot symbols. Channel parameters of the radio channel are estimated based on the training symbols. An equalized signal is generated based on the estimated channel parameters and data symbol. Primary and secondary demodulated symbols are generated based on the equalized signal.

Abstract translation: 本发明涉及用于GSM演进（EDGE）无线电接入网（GERAN）演进的全球移动通信系统（GSM）/增强数据速率的分级调制（HM）和解调。 在一个实施例中，通过基于第一位组生成主调制符号，基于第二位组生成二次调制符号，以及组合初次调制符号和次调制符号来生成HM符号。 在另一个实施例中，HM符号被解调。 在另一个实施例中，接收的GERAN信号被转换为基带复合符号值，其被处理以产生携带导频符号的训练符号和数据符号。 基于训练符号来估计无线信道的信道参数。 基于估计的信道参数和数据符号生成均衡信号。 基于均衡信号生成主和次解调符号。

公开(公告)号：US20070121939A1

公开(公告)日：2007-05-31

申请号：US11542405

申请日：2006-10-03

Applicant: Robert Olesen ,  Prabhakar Chitrapu ,  John Kaewell, ,  Bing Chiang ,  Richard Herschaft ,  John Hoffmann ,  Sung-Hyuk Shin ,  Alexander Reznik

Inventor： Robert Olesen ,  Prabhakar Chitrapu ,  John Kaewell, ,  Bing Chiang ,  Richard Herschaft ,  John Hoffmann ,  Sung-Hyuk Shin ,  Alexander Reznik

IPC: H04N7/167

CPC classification number: H04W12/02 ,  G06F21/16 ,  H04L2463/101 ,  H04L2463/103 ,  H04W12/0013

Abstract: In a communication system comprising a plurality of transmit/receive units (TRUs), a method for embedding a watermark into data includes modifying a carrier signal containing data to embed watermark information. The modified carrier signal is transmitted. A receiver receives the modified carrier signal and extracts the watermark information from the modified carrier signal.

Abstract translation: 在包括多个发送/接收单元（TRU）的通信系统中，将水印嵌入数据的方法包括修改包含数据的载波信号以嵌入水印信息。 发送修改的载波信号。 接收机接收经修改的载波信号，并从修改的载波信号中提取水印信息。

公开(公告)号：US20060133338A1

公开(公告)日：2006-06-22

申请号：US11283017

申请日：2005-11-18

Applicant: Alexander Reznik ,  Alan Carlton ,  Alain Briancon ,  Yogendra Shah ,  Prabhakar Chitrapu ,  Rajat Mukherjee ,  Marian Rudolf

Inventor： Alexander Reznik ,  Alan Carlton ,  Alain Briancon ,  Yogendra Shah ,  Prabhakar Chitrapu ,  Rajat Mukherjee ,  Marian Rudolf

IPC: H04Q7/24

CPC classification number: H04W12/08 ,  H04L27/3477 ,  H04L63/107 ,  H04W12/00503 ,  H04W12/02 ,  H04W12/12 ,  H04W16/30

Abstract: A method and system for securing wireless communications is disclosed. In one embodiment, different security policies are used based on the distance between a receiver and a transmitter, whereby data in the wireless communications can only be demodulated if received in particular trust zones. In another embodiment, a plurality of bit stream fragments are transmitted by a plurality of transmitters to a receiver located in an area where transmission patterns radiated by the transmitters intersect. Alternatively, the receiver performs a function on packet data units (PDUs) transmitted by the transmitters. In yet another embodiment, primary modulation points of a modulation constellation are split into clusters of proximate secondary modulation points which can be demodulated only by a receiver that is within range of the transmitter. In yet another embodiment, a main waveform is transmitted which overlays a QPSK signal with hierarchical modulation (HM) having encoded descrambling information.

Abstract translation: 公开了一种用于确保无线通信的方法和系统。 在一个实施例中，基于接收机和发射机之间的距离使用不同的安全策略，由此无线通信中的数据只有在特定的信任区域中被接收时才能被解调。 在另一个实施例中，多个比特流片段由多个发射机发射到位于由发射机辐射的传输模式相交的区域中的接收机。 或者，接收机对发射机发送的分组数据单元（PDU）执行功能。 在另一个实施例中，调制星座的初级调制点被分成近似二次调制点的簇，其可以仅由位于发射机的范围内的接收机解调。 在另一个实施例中，发送主波形，其叠加具有编码解扰信息的分层调制（HM）的QPSK信号。