公开(公告)号：US20060200673A1

公开(公告)日：2006-09-07

申请号：US11114286

申请日：2005-04-26

申请人： Guodong Zhang ,  Prabhakar Chitrapu

发明人： Guodong Zhang ,  Prabhakar Chitrapu

IPC分类号： H04L9/00

CPC分类号： H04L63/126 ,  H04L63/162 ,  H04W28/06 ,  H04W80/00

摘要： A method for reducing overhead when transmitting an Internet Protocol (IP) packet begins by selecting a watermarking signature based on the IP address of the packet. The watermarking signature is applied to the packet and the IP address is removed from the packet. The packet is sent to a receiver, which looks up the IP address of the packet by using the watermarking signature. The watermarking signature can be a radio frequency watermarking signature or a digital watermarking signature. A similar method employing watermarking can be used to reduce medium access control header overhead.

摘要翻译： 当通过基于分组的IP地址选择水印签名开始发送因特网协议（IP）分组时减少开销的方法。 将水印签名应用于分组，并从分组中移除IP地址。 该分组被发送到接收机，其通过使用水印签名来查找分组的IP地址。 水印签名可以是射频水印签名或数字水印签名。 使用水印的类似方法可以用于减少媒体访问控制头的开销。

公开(公告)号：US20060111149A1

公开(公告)日：2006-05-25

申请号：US11315452

申请日：2005-12-22

申请人： Prabhakar Chitrapu ,  Steven Goldberg

发明人： Prabhakar Chitrapu ,  Steven Goldberg

IPC分类号： H04Q7/20

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

摘要： 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

申请人： Prabhakar Chitrapu ,  Robert Stack ,  Philip Farnum

发明人： Prabhakar Chitrapu ,  Robert Stack ,  Philip Farnum

IPC分类号： H04B7/212

CPC分类号： H04B7/2656 ,  H04B7/2125

摘要： 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.

摘要翻译： 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

申请人： Prabhakar Chitrapu ,  John Kaewell

发明人： Prabhakar Chitrapu ,  John Kaewell

IPC分类号： H04Q7/20

CPC分类号： H04M3/436 ,  H04M1/72569 ,  H04M1/72572 ,  H04M3/4211 ,  H04M2203/4536 ,  H04M2242/14

摘要： 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.

摘要翻译： 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

申请人： Prabhakar Chitrapu

发明人： Prabhakar Chitrapu

IPC分类号： H04B7/14

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

摘要： 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.

摘要翻译： 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

申请人： Kamel Shaheen ,  Prabhakar Chitrapu ,  Brian Kiernan

发明人： Kamel Shaheen ,  Prabhakar Chitrapu ,  Brian Kiernan

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

CPC分类号： H04W88/16 ,  H04L65/1016 ,  H04W4/12 ,  H04W80/00 ,  H04W92/24

摘要： 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.

摘要翻译： 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

申请人： Prabhakar Chitrapu ,  Wei Lin

发明人： Prabhakar Chitrapu ,  Wei Lin

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

CPC分类号： H04M3/56 ,  H04M3/568 ,  H04M9/08 ,  H04Q1/4575

摘要： 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.

摘要翻译： 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。