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    Technique of controlling telephone calls
    13.
    发明授权
    Technique of controlling telephone calls 失效
    控制电话技术

    公开(公告)号：US5809110A

    公开(公告)日：1998-09-15

    申请号：US594411

    申请日：1996-01-31

    Applicant: Mark Ulrich ,  Prabhakar Chitrapu

    Inventor： Mark Ulrich ,  Prabhakar Chitrapu

    IPC: H04B3/46 ,  H04M3/22 ,  H04M11/06 ,  H04M1/24 ,  H04J1/16 ,  H04M11/00

    CPC classification number: H04M3/22 ,  H04B3/46 ,  H04M11/06

    Abstract: An improved system for minimizing toll charges is disclosed wherein line quality is measured and a call is terminated if the line quality is not at an acceptable level to allow for the highest possible bit rates during data transfer or to guarantee a certain minimum degree of quality.

    Abstract translation: 公开了一种用于最小化费用费用的改进系统，其中线路质量被测量并且如果线路质量不在可接受的水平以允许数据传输期间的最高可能比特率或者保证一定的最低质量程度的话，终止呼叫。

    Tone blocking using variable delay buffer
    14.
    发明授权
    Tone blocking using variable delay buffer 失效
    使用可变延迟缓冲区进行音调阻塞

    公开(公告)号：US5687177A

    公开(公告)日：1997-11-11

    申请号：US729048

    申请日：1996-10-10

    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 and method 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调被传送给其他与会者的音调阻塞系统和方法。 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。

    WIRELESS COMMUNICATION METHOD AND APPARATUS FOR USING FRACTIONAL CHANNELS TO SUPPORT COMMUNICATION SERVICES THAT USE HIGHER ORDER MODULATION
    15.
    发明申请
    WIRELESS COMMUNICATION METHOD AND APPARATUS FOR USING FRACTIONAL CHANNELS TO SUPPORT COMMUNICATION SERVICES THAT USE HIGHER ORDER MODULATION 审中-公开
    无线通信方法和使用分支信道支持使用更高阶调制的通信服务的设备

    公开(公告)号：US20080013486A1

    公开(公告)日：2008-01-17

    申请号：US11773595

    申请日：2007-07-05

    Applicant: Prabhakar Chitrapu ,  Paul Russell

    Inventor： Prabhakar Chitrapu ,  Paul Russell

    IPC: H04Q7/00 ,  H04J9/00 ,  H04Q7/20

    CPC classification number: H04L27/0008 ,  H04L1/0003 ,  H04L27/34

    Abstract: A method and apparatus for enhancing communication services in an evolved global system for mobile communications (GSM)/enhanced data rates for GSM evolution (EDGE) radio access network (GERAN) are disclosed. At least one full rate physical channel and/or half rate physical channel are provided to support communication services that do not require higher order modulation (HOM), and at least one fractional rate physical channel is provided to support the communication services that require HOM. The fractional rate channel occupies N timeslots for every M frames of a channel, whereby N/M is less than one half. The fractional rate channel may be used when communication services are provided on a channel that uses either 16 or 32 quadrature amplitude modulation (QAM) in a dual transfer mode (DTM) session. The communications services include at least one of voice communication services, circuit switched (CS) services and supplementary services.

    Abstract translation: 公开了一种用于在演进的用于GSM演进（EDGE）无线电接入网络（GERAN）的移动通信（GSM）/增强数据速率的全球系统中增强通信服务的方法和装置。 提供至少一个全速率物理信道和/或半速率物理信道以支持不需要更高阶调制（HOM）的通信服务，并且提供至少一个分数速率物理信道以支持需要HOM的通信服务。 分数速率信道占用信道每M帧的N个时隙，由此N / M小于一半。 当在双传输模式（DTM）会话中使用16或32正交幅度调制（QAM）的信道上提供通信服务时，可以使用分数速率信道。 通信服务包括语音通信服务，电路交换（CS）服务和辅助服务中的至少一个。

    WIRELESS COMMUNICATION METHOD AND SYSTEM FOR BIT INTERLEAVED CODED MODULATION AND ITERATIVE DECODING
    16.
    发明申请
    WIRELESS COMMUNICATION METHOD AND SYSTEM FOR BIT INTERLEAVED CODED MODULATION AND ITERATIVE DECODING 有权
    用于位交互编码调制和迭代解码的无线通信方法和系统

    公开(公告)号：US20070260958A1

    公开(公告)日：2007-11-08

    申请号：US11617013

    申请日：2006-12-28

    Applicant: Yingxue Li ,  Prabhakar Chitrapu

    Inventor： Yingxue Li ,  Prabhakar Chitrapu

    IPC: H03M13/29

    CPC classification number: H04L1/0048 ,  H03M13/27 ,  H03M13/6362 ,  H04L1/005 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/06 ,  H04L5/0023 ,  H04L27/2626 ,  H04L27/2647

    Abstract: A wireless communication method and system for performing bit-interleaved coded modulation and iterative decoding. The system includes a transmitter and a receiver. The transmitter encodes incoming bits to generate coded bits, punctures the coded bits in accordance with a predetermined puncturing pattern to generate surviving channel bits and stolen bits and interleaves the surviving bits into interleaved surviving bits. The interleaved surviving bits are mapped to channel symbols and the stolen bits are interleaved to generate interleaved stolen bits. At least one of a plurality of antennas is selected to transmit the channel symbols based on the value of the interleaved stolen bits. The receiver receives the transmitted channel symbols, estimates a posteriori probability for both the channel symbols and the stolen bits, and retrieves information of the stolen bits by determining the selected antenna used to transmit the channel symbols.

    Abstract translation: 一种用于执行比特交织的编码调制和迭代解码的无线通信方法和系统。 该系统包括发射机和接收机。 发射机对输入比特进行编码以产生编码比特，根据预定的穿孔模式对编码比特进行打孔，以产生幸存的信道比特和被盗的比特，并将幸存的比特交织到交织的幸存比特中。 交织的存活比特被映射到信道符号，并且被窃取的比特被交织以产生交织的被盗的比特。 选择多个天线中的至少一个基于交织的被盗比特的值来发送信道符号。 接收机接收所发送的信道符号，估计信道符号和被盗的比特的后验概率，并且通过确定用于发送信道符号的所选择的天线来检索被盗的比特的信息。

    Method and system for a low-overhead mobility management protocol in the internet protocol layer
    17.
    发明申请
    Method and system for a low-overhead mobility management protocol in the internet protocol layer 有权
    互联网协议层的低开销移动性管理协议的方法和系统

    公开(公告)号：US20070025366A1

    公开(公告)日：2007-02-01

    申请号：US11542842

    申请日：2006-10-04

    Applicant: Sharif Shahrier ,  Prabhakar Chitrapu

    Inventor： Sharif Shahrier ,  Prabhakar Chitrapu

    IPC: H04L12/56

    CPC classification number: H04W36/0083 ,  C07C43/313 ,  C07C69/63 ,  C07D307/79 ,  H04L29/06 ,  H04L29/12009 ,  H04L29/1233 ,  H04L29/12367 ,  H04L29/12424 ,  H04L29/12462 ,  H04L45/26 ,  H04L61/25 ,  H04L61/2514 ,  H04L61/2535 ,  H04L61/255 ,  H04W8/04 ,  H04W8/082 ,  H04W8/26 ,  H04W40/36 ,  H04W80/04 ,  H04W84/105 ,  H04W88/005

    Abstract: A system and method for supporting mobile Internet communication is provided which employs a plurality of Routers and a plurality of Mobile Nodes (MNs). Each Router has a unique communication address. Each MN is associated with a home Router. Each Router has an associated Mobile Node Location List identifying each MN for which the Router is the home Router and the communication address of a Router corresponding to a current location of each such MN. Each MN is movable from an old location where the MN communicates with the Internet via one Router to a current location where the MN communicates with the Internet via a different Router. Communication at the current location via the different Router is established by communicating to the MN's home Router the communication address of the different Router as the communication address corresponding to the MN's current location. Accordingly, a data communication from a corresponding node (CN) to a selected MN is communicated to the selected MN by accessing the Mobile Node Location List of the selected MN's home Router to determine the communication address corresponding to the selected MN's current location and directing the data communication to that determined communication address.

    Abstract translation: 提供一种用于支持移动因特网通信的系统和方法，其采用多个路由器和多个移动节点（MN）。 每个路由器都有一个独特的通讯地址。 每个MN与归属路由器相关联。 每个路由器具有相关联的移动节点位置列表，其标识路由器是家庭路由器的每个MN，以及对应于每个这样的MN的当前位置的路由器的通信地址。 每个MN可以从MN通过一个路由器与因特网通信的旧位置移动到MN通过不同路由器与因特网通信的当前位置。 通过与MN的归属路由器通信，将不同路由器的通信地址作为与MN当前位置对应的通信地址进行通信，建立通过不同路由器在当前位置的通信。 因此，通过访问所选MN的归属路由器的移动节点位置列表来确定与所选择的MN的当前位置相对应的通信地址，并将所指示的MN的当前位置的通信地址指向 数据通信到确定的通信地址。

    Using watermarking to reduce communication overhead
    20.
    发明申请
    Using watermarking to reduce communication overhead 有权
    使用水印来减少通信开销

    公开(公告)号：US20060200673A1

    公开(公告)日：2006-09-07

    申请号：US11114286

    申请日：2005-04-26

    Applicant: Guodong Zhang ,  Prabhakar Chitrapu

    Inventor： Guodong Zhang ,  Prabhakar Chitrapu

    IPC: H04L9/00

    CPC classification number: H04L63/126 ,  H04L63/162 ,  H04W28/06 ,  H04W80/00

    Abstract: 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.

    Abstract translation: 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。

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