中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

54 records (took 0.028 seconds)

    PROTOCOL FOR ALLOCATING UPSTREAM SLOTS OVER A LINK IN A POINT-TO-MULTIPOINT COMMUNICATION SYSTEM
    32.
    发明申请
    PROTOCOL FOR ALLOCATING UPSTREAM SLOTS OVER A LINK IN A POINT-TO-MULTIPOINT COMMUNICATION SYSTEM 有权
    通过点对多点通信系统中的链路分配上行链路的协议

    公开(公告)号：US20120127967A1

    公开(公告)日：2012-05-24

    申请号：US13360334

    申请日：2012-01-27

    Applicant: Subir Varma

    Inventor： Subir Varma

    IPC: H04W72/04 ,  H04J3/00

    CPC classification number: H04W16/04 ,  H04J3/1694 ,  H04L12/18 ,  H04W28/04 ,  H04W72/0413 ,  H04W72/0446 ,  H04W72/1284 ,  H04W72/14 ,  H04W74/02 ,  H04W74/06 ,  H04W74/0833

    Abstract: A system for controlling a contention state for a communication link between a base station controller and customer premises equipment in point-to-multipoint communication. The contention state is controlled using a state machine, which includes a grant pending absent state in which a unicast request slot is maintained open for use by the customer premises equipment. During the grant pending absent state, the customer premises equipment sends no upstream data to the base station controller but can use the unicast request slot to request a data slot for sending upstream data to the base station controller. In the grant pending state, the customer premises equipment preferably uses piggybacking to request grant of a next data slot while sending upstream data to the base station controller.

    Abstract translation: 一种用于在点对多点通信中控制基站控制器和客户驻地设备之间的通信链路的争用状态的系统。 使用状态机来控制竞争状态，该状态机包括待保持状态，其中单播请求时隙保持打开以供客户驻地设备使用。 在待机待命状态期间，客户驻地设备不向基站控制器发送上行数据，但可以使用单播请求时隙来请求向基站控制器发送上行数据的数据时隙。 在授权等待状态下，客户端设备优选地使用捎带来向基站控制器发送上行数据来请求下一个数据时隙的授权。

    Measuring signal strength in a multiple-input multiple-output antenna environment
    33.
    发明授权
    Measuring signal strength in a multiple-input multiple-output antenna environment 有权
    测量多输入多输出天线环境中的信号强度

    公开(公告)号：US08170618B1

    公开(公告)日：2012-05-01

    申请号：US12197745

    申请日：2008-08-25

    Applicant: Subir Varma ,  Durga Prasad Satapathy

    Inventor： Subir Varma ,  Durga Prasad Satapathy

    IPC: H04M1/00

    CPC classification number: H04L1/0625

    Abstract: A wireless communication device is operated in a M by N multiple-input multiple-output (MIMO) mode. M is the number of antennas transmitting to the communication device from a first base station. N the number of receiving antennas and receivers. M and N are integers greater than one. The wireless communication device is operated in an M by N−1 MIMO mode while a first one of the N receiving antennas and a first one of the N receivers receives wireless communication from a second base station.

    Abstract translation: 无线通信设备以M×N多输入多输出（MIMO）模式工作。 M是从第一基站向通信设备发送的天线的数量。 N是接收天线和接收机的数量。 M和N是大于1的整数。 无线通信设备以M为N-1 MIMO模式操作，而N个接收天线中的第一个和N个接收机中的第一个接收机从第二基站接收无线通信。

    Dynamic wireless link adaptation
    34.
    发明授权
    Dynamic wireless link adaptation 有权
    动态无线链路适配

    公开(公告)号：US07388919B2

    公开(公告)日：2008-06-17

    申请号：US11231537

    申请日：2005-09-20

    Applicant: Subir Varma ,  Reza Majidi-Ahy ,  Joseph Hakim ,  Wendy Chiu Fai Wong

    Inventor： Subir Varma ,  Reza Majidi-Ahy ,  Joseph Hakim ,  Wendy Chiu Fai Wong

    IPC: H04L27/00 ,  H04L1/00

    CPC classification number: H04L1/0002 ,  H04B17/309 ,  H04B17/336 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/002 ,  H04L1/0034 ,  H04L1/16 ,  H04L1/1867 ,  Y02D50/10

    Abstract: A system that adapts wireless link parameters for a wireless communication link. A measure is determined of errors occurring in communication over a wireless link. In a case that the measure of errors corresponds to more errors than a first predetermined threshold, communication changes from a first set of wireless link parameters to a second set of wireless link parameters. The second set of wireless link parameters corresponds to higher error tolerance than the first set of wireless link parameters. In a case that the measure of errors corresponds to fewer errors than a second predetermined threshold, communication changes from the first set of wireless link parameters to a third set of wireless link parameters. The third set of wireless link parameters corresponds to lower error tolerance than the first set of wireless link parameters. Preferably, the measure of errors is determined by monitoring a number of NACK messages and a number of ACK messages that occur. It is determined that the measure of errors corresponds to more errors than the first predetermined threshold when more than a predetermined number of NACK messages occur in succession. It is determined that the measure of errors corresponds to fewer errors than the second predetermined threshold when more than a predetermined number of ACK messages occur in succession.

    Abstract translation: 适应无线通信链路的无线链路参数的系统。 确定通过无线链路进行的通信中发生的错误的度量。 在错误测量对应于比第一预定阈值更多的错误的情况下，通信从第一组无线链路参数改变为第二组无线链路参数。 第二组无线链路参数对应于比第一组无线链路参数更高的误差容限。 在错误测量对应于比第二预定阈值更少的错误的情况下，通信从第一组无线链路参数改变为第三组无线链路参数。 第三组无线链路参数对应于比第一组无线链路参数更低的误差容限。 优选地，通过监视多个NACK消息和发生的ACK消息的数量来确定错误的度量。 当连续发生多于一个预定数量的NACK消息时，确定错误度量对应于比第一预定阈值更多的错误。 当连续发生多于一个预定数量的ACK消息时，确定错误度量对应于比第二预定阈值更少的错误。

    Dynamic link parameter control
    35.
    发明授权
    Dynamic link parameter control 失效
    动态链接参数控制

    公开(公告)号：US06819657B1

    公开(公告)日：2004-11-16

    申请号：US09714783

    申请日：2000-11-16

    Applicant: Subir Varma

    Inventor： Subir Varma

    IPC: H04B7005

    CPC classification number: H04L1/0025 ,  H04L1/0007 ,  H04L1/0009 ,  H04W28/18 ,  H04W88/12

    Abstract: The invention provides a method and system for dynamically controlling link parameters during communication between one or more receiver/transmitters. Transmissions are sent as frames from a Base Station Controller to one or more Customer Premises Equipment. Together with a payload, each frame contains a special control message that pre-announces to both the transmitter and receiver the link parameters to be used until changed. The receiving Customer Premises Equipment processes the link parameters and returns a payload of its own within the same frame. With this dynamic approach, link parameters may be changed as often as every frame.

    Abstract translation: 本发明提供了一种用于在一个或多个接收器/发射器之间的通信期间动态地控制链路参数的方法和系统。 传输作为帧从基站控制器发送到一个或多个客户驻地设备。 与有效载荷一起，每个帧包含一个特殊的控制消息，其预先向发射机和接收机通知要使用的链路参数直到改变。 接收的客户驻地设备处理链路参数，并在同一帧内返回自己的有效载荷。 通过这种动态方法，链路参数可以像每一帧一样频繁地改变。

    Method and apparatus for controlling communication channels using contention and polling schemes
    37.
    发明授权
    Method and apparatus for controlling communication channels using contention and polling schemes 失效
    使用竞争和轮询方案控制通信信道的方法和装置

    公开(公告)号：US06275497B1

    公开(公告)日：2001-08-14

    申请号：US08917735

    申请日：1997-08-27

    Applicant: Subir Varma ,  Frederick Enns

    Inventor： Subir Varma ,  Frederick Enns

    IPC: H04L1228

    CPC classification number: H04L29/06 ,  H04L12/2801 ,  H04L47/10 ,  H04L67/325 ,  H04L67/42 ,  H04L69/329

    Abstract: A medium access controller for a multi-user network that assigns or changes the operating protocol of multiple upstream channels according to user loading, user status, and/or type of payload data transfers requested by the user or detected by the controller. One group of upstream channels utilizes a contention-only protocol for non-responding or off-line users, a second group utilizes a limited type polling protocol for users requiring only brief transfers of payload data, and a third group utilizes an exhaustive polling protocol user requiring large amounts of payload data transfers. Limited type polling provides low latency for quick response to accommodate multiple users, while exhaustive polling provides large data throughput at the expense of latency. Additional levels of limited or exhaustive polling may be employed to accommodate a larger variety of users needs. In addition, the channels themselves may be dynamically reclassified between and among contention and first and/or other level polling modes based on user loading and/or the nature and character of on-going data transfers in order to achieve maximum utilization of shared resources. After initiating a data transmission, the controller may also dynamically assign channels to a user based on detected changes in actual data transmissions. Thus, rules based on user activity level may be implemented to determine when a user is switched between channel groups. Essentially, the controller may effect switching of the users' upstream channels dynamically and intelligently on a packet-by-packet basis. Users may include modems and/or other terminal devices in a client-server or other data communication network.

    Abstract translation: 用于多用户网络的介质访问控制器，其根据用户加载，用户状态和/或用户请求的或由控制器检测的有效载荷数据传输的类型来分配或改变多个上行信道的操作协议。 一组上行信道利用仅针对非响应或离线用户的争用协议，第二组对仅需要有效载荷数据的简短传输的用户使用有限类型的轮询协议，并且第三组利用详尽的轮询协议用户 需要大量的有效载荷数据传输。 有限类型的轮询提供低延迟以快速响应以适应多个用户，而穷举轮询以牺牲延迟为代价提供大的数据吞吐量。 可以采用附加级别的有限或详尽的轮询来适应更多种类的用户需求。 此外，信道本身可以基于用户负载和/或正在进行的数据传输的性质和特性在竞争和第一和/或其他级别轮询模式之间和之间动态地重新分类，以便实现共享资源的最大利用。 在启动数据传输之后，控制器还可以基于检测到的实际数据传输的变化来动态地向用户分配信道。 因此，可以实现基于用户活动级别的规则来确定用户何时在信道组之间切换。 基本上，控制器可以在逐个分组的基础上动态地和智能地实现用户的上游信道的切换。 用户可以在客户服务器或其他数据通信网络中包括调制解调器和/或其他终端设备。

    Method to control jitter in high-speed packet-switched networks
    38.
    发明授权
    Method to control jitter in high-speed packet-switched networks 失效
    控制高速分组交换网络抖动的方法

    公开(公告)号：US5933414A

    公开(公告)日：1999-08-03

    申请号：US738647

    申请日：1996-10-29

    Applicant: Leonidas Georgiadis ,  Roch A. Guerin ,  Vinod Gerard John Peris ,  Rajendran Rajan ,  Subir Varma

    Inventor： Leonidas Georgiadis ,  Roch A. Guerin ,  Vinod Gerard John Peris ,  Rajendran Rajan ,  Subir Varma

    IPC: H04L1/20 ,  H04L12/56 ,  H04Q11/04 ,  H04L5/22

    CPC classification number: H04L1/205 ,  H04Q11/0478 ,  H04L2012/5649 ,  H04L2012/5652

    Abstract: The present invention addresses the issue of controlling delay variations (jitter) in packet-switched networks by enhancing the capabilities of existing scheduling policies. The idea is to use a few bits in the header of packets to send jitter control information to the downstream network elements, so that the delay variation caused by the upstream network element, is compensated for by the downstream network element. The key point to observe is that packets (or cells in ATM) may be small, and therefore, not contain many bits in the header that can be used for jitter control. We describe a unique scheme, that utilizes the bits that are available for jitter control in an efficient manner, allowing for the desired jitter to be obtained with as few bits as possible.

    Abstract translation: 本发明通过增强现有调度策略的能力来解决分组交换网络中的延迟变化（抖动）的控制问题。 想法是在报文头中使用几个比特来向下游网元发送抖动控制信息，从而使上游网元产生的延迟变化由下游网元补偿。 要观察的关键点是分组（或ATM中的小区）可能很小，因此在报头中不包含可用于抖动控制的多个位。 我们描述了一种独特的方案，它以有效的方式利用可用于抖动控制的位，从而允许以尽可能少的位获得所需的抖动。

    ATM communication system interconnect/termination unit
    39.
    发明授权
    ATM communication system interconnect/termination unit 失效

    公开(公告)号：US5841772A

    公开(公告)日：1998-11-24

    申请号：US612194

    申请日：1996-03-07

    Applicant: Thomas Daniel ,  Dieter Nattkemper ,  Subir Varma

    Inventor： Thomas Daniel ,  Dieter Nattkemper ,  Subir Varma

    IPC: H04L12/56 ,  H04Q11/04 ,  H04J3/02

    CPC classification number: H04L12/5602 ,  H04Q11/0478 ,  H04L2012/5658 ,  H04L2012/5679

    Abstract: An asynchronous transfer mode (ATM) digital electronic communication system includes an ATM communication system interconnection and termination unit (ATMCSI/TU). This ATMCSI/TU includes both a programmable microprocessor and several hardware-implemented coprocessors. The hardware-implemented coprocessors are under control of the microprocessor, and are dedicated to the performing of repetitive tasks. Thus, the microprocessor is freed to perform supervisory tasks in the ATM in addition to performing tasks associated with actual communication of digital data packages (i.e., CS-PDU's) in the ATM system. Thus, the APU is freed from doing repetitive data manipulation tasks, while these tasks are performed by one or more hardware-implemented coprocessors using memory mapped data structures and linked lists of data.

Patent Agency Ranking