Facilitating defense against MAC table overflow attacks
    32.
    发明授权
    Facilitating defense against MAC table overflow attacks 有权
    方便防范MAC表溢出攻击

    公开(公告)号:US08180874B2

    公开(公告)日:2012-05-15

    申请号:US12008535

    申请日:2008-01-11

    IPC分类号: G06F15/173

    摘要: A method for defending against MAC table overflow attacks comprises a plurality of operations. An operation is performed for determining whether each one of a plurality of MAC addresses within a MAC table has one-way traffic or two-way traffic corresponding thereto. Thereafter, operations are performed for designating each MAC address having two-way traffic corresponding thereto as a first category of MAC address and for designating each MAC address having one-way traffic corresponding thereto as a second category of MAC address. In response to the number of the MAC addresses designated as the second category of MAC address exceeding a prescribed threshold value, an operation is performed for causing a timeout value of at least a portion of the MAC addresses designated as the second category of MAC address to be less than a timeout value of the MAC addresses designated as the first category of MAC address.

    摘要翻译: 防止MAC表溢出攻击的方法包括多个操作。 执行用于确定MAC表中的多个MAC地址中的每一个是否具有与其对应的单向业务或双向业务的操作。 此后,执行操作来指定具有对应于其的双向业务的每个MAC地址作为第一类MAC地址,并且用于指定具有与其对应的单向业务的每个MAC地址作为第二类MAC地址。 响应于指定为超过规定阈值的MAC地址的第二类别的MAC地址的数量,执行用于使指定为第二类别MAC地址的MAC地址的至少一部分的超时值的操作 小于指定为第一类MAC地址的MAC地址的超时值。

    Method for Achieving Converter Transformer for Suppressing DC Bias Magnet
    33.
    发明申请
    Method for Achieving Converter Transformer for Suppressing DC Bias Magnet 有权
    实现用于抑制直流偏置磁体的变换器变压器的方法

    公开(公告)号:US20120090164A1

    公开(公告)日:2012-04-19

    申请号:US13380815

    申请日:2009-06-26

    IPC分类号: H01F41/02

    CPC分类号: H01F41/0233 Y10T29/49078

    摘要: A method for achieving converter transformer for suppressing DC bias magnet comprises increasing the seaming width of the transformer core lamination, which comprises in detail calculating the width and the height of each stage of lamination according to the reserved seaming width of the lamination, the sectional area of the core, the space between columns, and the height of the window, shearing the lamination based on the width and the height of the lamination obtained by calculating, overlapping two pieces of laminations into one piece of lamination according to the order of stages, placing them on the core frame alternately by stages, and after overlapping all the laminations, fastening each stage of lamination.

    摘要翻译: 用于实现用于抑制直流偏置磁体的转换器变压器的方法包括增加变压器芯层叠的接缝宽度,其包括根据层压的预留接缝宽度来详细计算每个层叠层的宽度和高度,截面积 芯的间隔,柱之间的空间和窗的高度,基于通过计算将层叠体的宽度和高度按照阶段的顺序将两片叠片重叠成一片层叠而剪切层压, 将它们分层放置在核心框架上,并且在重叠所有叠片之后,紧固每个层压阶段。

    DUAL INDICATOR SCHEME FOR CHANNEL STATE INFORMATION FEEDBACK
    34.
    发明申请
    DUAL INDICATOR SCHEME FOR CHANNEL STATE INFORMATION FEEDBACK 有权
    双向指示通道状态信息反馈方案

    公开(公告)号:US20110249763A1

    公开(公告)日:2011-10-13

    申请号:US13081832

    申请日:2011-04-07

    IPC分类号: H04K1/10

    摘要: Codebook based communication of precoding data between two stations involves determining a ‘best fit’ precoding at a receiving station, on the basis of channel state measurements taken therein. The best fit precoding is compared with pre-agreed entries in a codebook, and an indicator is sent back to the terminal emitting the analysed signal. The determination is separated into two elements, one being sufficient for use with SU-MIMO, and another being provided, with a second codebook indicator, if MU-MIMO is to be employed. This second codebook indicator points to a codebook of eigenvector representations for the multi-user space in which the channel is persisting.

    摘要翻译: 基于在两个站之间的基于码本的预编码数据的通信包括基于其中采用的信道状态测量来确定接收站处的“最佳拟合”预编码。 将最佳拟合预编码与码本中的预先约定条目进行比较,并将指示符发送回发送分析信号的终端。 确定被分成两个元素,一个足以与SU-MIMO一起使用,另一个被提供有第二码本指示符,如果要使用MU-MIMO。 该第二码本指示符指向其中信道持续的多用户空间的特征向量表示的码本。

    Source-channel approach to channel coding with side information
    35.
    发明授权
    Source-channel approach to channel coding with side information 有权
    信道编码与信息源的信道方法

    公开(公告)号:US08020082B2

    公开(公告)日:2011-09-13

    申请号:US11684427

    申请日:2007-03-09

    IPC分类号: G06F11/00

    摘要: Code designs for channel coding with side information (CCSI) based on combined source-channel coding are disclosed. These code designs combine trellis-coded quantization (TCQ) with irregular repeat accumulate (IRA) codes. The EXIT chart technique is used for IRA channel code design (and especially for capacity-approaching IRA channel code design). We emphasize the role of strong source coding and endeavor to achieve as much granular gain as possible by using TCQ. These code designs synergistically combine TCQ with IRA codes. By bringing together TCQ and EXIT chart-based IRA code designs, we are able to approach the theoretical limit of dirty-paper coding.

    摘要翻译: 公开了基于组合源信道编码的具有侧信息(CCSI)的信道编码的码设计。 这些代码设计将网格编码量化(TCQ)与不规则重复累加(IRA)代码相结合。 EXIT图表技术用于IRA通道代码设计(特别是对于容量接近的IRA通道代码设计)。 我们强调强源代码的作用,努力通过使用TCQ实现尽可能多的粒度增益。 这些代码设计将TCQ与IRA代码相结合。 通过汇总TCQ和EXIT图表的IRA代码设计,我们可以接近脏纸编码的理论限制。

    WIRELESS COMMUNICATION METHOD AND APPARATUS
    36.
    发明申请
    WIRELESS COMMUNICATION METHOD AND APPARATUS 审中-公开
    无线通信方法和设备

    公开(公告)号:US20100246715A1

    公开(公告)日:2010-09-30

    申请号:US12724814

    申请日:2010-03-16

    IPC分类号: H04L27/00

    摘要: In a wireless communications system, a method of processing data prior to transmission thereof to a plurality of stations. The method includes determining a channel matrix using a plurality of weighted channel responses, each of which is associated with one of the plurality of stations and weighted by a gain factor corresponding to the station, wherein the gain factor is inversely proportional to a noise power of the station. The data is then processed in accordance with a precoding scheme using the determined channel matrix.

    摘要翻译: 在无线通信系统中,一种在将数据发送到多个站之前处理数据的方法。 该方法包括使用多个加权信道响应来确定信道矩阵,每个信道响应与多个站中的一个相关联,并且通过对应于该站的增益因子进行加权,其中增益因子与噪声功率成反比 车站。 然后根据使用所确定的信道矩阵的预编码方案来处理数据。

    Distributed source coding with context
    37.
    发明授权
    Distributed source coding with context 有权
    具有上下文的分布式源代码编码

    公开(公告)号:US07743309B2

    公开(公告)日:2010-06-22

    申请号:US11384062

    申请日:2006-03-17

    申请人: Jin Li Yong Sun

    发明人: Jin Li Yong Sun

    IPC分类号: H03M13/00

    CPC分类号: H03M7/30

    摘要: A process for distributed source coding (DSC) using context is presented. By forming contexts from prior coded bitplanes of both a reference and DSC coded peer, the DSC virtual channel is split into several virtual sub-channels of different characteristics. The selection of the sub-channel becomes side information that is known to the receiver. As a result, the DSC coding bitrate is reduced.

    摘要翻译: 介绍了使用上下文的分布式源代码(DSC)流程。 通过从参考和DSC编码对等体的先前编码位平面形成上下文,DSC虚拟信道被分成几个不同特征的虚拟子信道。 子频道的选择成为接收机已知的侧信息。 结果,DSC编码比特率降低。

    Method and apparatus for fingerprinting systems and operating systems in a network
    38.
    发明申请
    Method and apparatus for fingerprinting systems and operating systems in a network 有权
    网络中指纹系统和操作系统的方法和装置

    公开(公告)号:US20090182864A1

    公开(公告)日:2009-07-16

    申请号:US12008856

    申请日:2008-01-15

    IPC分类号: G06F15/16

    摘要: A system and method for identifying the number of computer hosts and types of operating systems behind a network address translation is provided. The method includes processing an internet protocol packet associated with the host computer system. The process may involve capturing the internet protocol packet and extracting key fields from the internet protocol packet to produce a fingerprint. The method continues with analyzing the fields in order to determine if a network address translator is connected between the host computer and a public network (e.g. the internet). If there is a network address translator connected, fields may be analyzed in order to determine the number of computers using the network address translator. The fields may also be analyzing in order to determine with a level of probability that the fingerprint identifies the correct operating system running the host computers. Generally, the internet protocol packet that is analyzing will be captured from an aggregation point in the carrier network.

    摘要翻译: 提供了一种用于识别计算机主机数量和网络地址转换背后的操作系统类型的系统和方法。 该方法包括处理与主计算机系统相关联的因特网协议分组。 该过程可以涉及捕获因特网协议分组并从互联网协议分组提取密钥字段以产生指纹。 该方法继续分析这些字段以便确定网络地址转换器是否连接在主计算机和公共网络(例如因特网)之间。 如果连接了网络地址转换器,则可以分析字段以确定使用网络地址转换器的计算机的数量。 这些字段也可能是分析以便以指纹识别运行主计算机的正确操作系统的概率水平来确定。 一般来说,正在分析的因特网协议分组将从运营商网络中的汇聚点获取。

    Facilitating defense against MAC table overflow attacks
    39.
    发明申请
    Facilitating defense against MAC table overflow attacks 有权
    方便防范MAC表溢出攻击

    公开(公告)号:US20090182854A1

    公开(公告)日:2009-07-16

    申请号:US12008535

    申请日:2008-01-11

    IPC分类号: G06F15/173

    摘要: A method for defending against MAC table overflow attacks comprises a plurality of operations. An operation is performed for determining whether each one of a plurality of MAC addresses within a MAC table has one-way traffic or two-way traffic corresponding thereto. Thereafter, operations are performed for designating each MAC address having two-way traffic corresponding thereto as a first category of MAC address and for designating each MAC address having one-way traffic corresponding thereto as a second category of MAC address. In response to the number of the MAC addresses designated as the second category of MAC address exceeding a prescribed threshold value, an operation is performed for causing a timeout value of at least a portion of the MAC addresses designated as the second category of MAC address to be less than a timeout value of the MAC addresses designated as the first category of MAC address.

    摘要翻译: 防止MAC表溢出攻击的方法包括多个操作。 执行用于确定MAC表中的多个MAC地址中的每一个是否具有与其对应的单向业务或双向业务的操作。 此后,执行操作来指定具有对应于其的双向业务的每个MAC地址作为第一类MAC地址,并且用于指定具有与其对应的单向业务的每个MAC地址作为第二类MAC地址。 响应于指定为超过规定阈值的MAC地址的第二类别的MAC地址的数量,执行用于使指定为第二类别MAC地址的MAC地址的至少一部分的超时值的操作 小于指定为第一类MAC地址的MAC地址的超时值。

    ADAPTIVE ENGINE INJECTION FOR EMISSIONS REDUCTION
    40.
    发明申请
    ADAPTIVE ENGINE INJECTION FOR EMISSIONS REDUCTION 有权
    自动发动机喷射减少排放

    公开(公告)号:US20080295798A1

    公开(公告)日:2008-12-04

    申请号:US11754402

    申请日:2007-05-29

    IPC分类号: F02B1/00

    摘要: NOx and soot emissions from internal combustion engines, and in particular compression ignition (diesel) engines, are reduced by varying fuel injection timing, fuel injection pressure, and injected fuel volume between low and greater engine loads. At low loads, fuel is injected during one or more low-pressure injections occurring at low injection pressures between the start of the intake stroke and approximately 40 degrees before top dead center during the compression stroke. At higher loads, similar injections are used early in each combustion cycle, in addition to later injections which preferably occur between about 90 degrees before top dead center during the compression stroke, and about 90 degrees after top dead center during the expansion stroke (and which most preferably begin at or closely adjacent the end of the compression stroke). These later injections have higher injection pressure, and also lower injected fuel volume, than the earlier injections.

    摘要翻译: 来自内燃机,特别是压缩点火(柴油)发动机的NOx和烟尘排放通过改变燃料喷射正时,燃料喷射压力和在低和较大发动机负荷之间的喷射燃料体积来减少。 在低负载时,在进气冲程开始之前以及在压缩冲程中的上止点之前大约40度之间的低喷射压力下进行一次或多次低压喷射时,喷射燃料。 在较高的载荷下,在每个燃烧循环中早期使用类似的喷射,除了优选在压缩冲程期间在上止点之前大约90度之间和在膨胀冲程期间的大约90度之后的上止点之后进行的后续喷射(以及哪个 最优选开始于或紧邻压缩冲程的结束)。 这些后续注射具有比早期注射更高的注射压力,并且还降低喷射燃料体积。