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48 条记录 (耗时 0.041 秒)

    Method for ensuring medium access in a wireless network
    42.
    发明授权
    Method for ensuring medium access in a wireless network 有权
    确保无线网络中的媒体接入的方法

    公开(公告)号：US08102808B2

    公开(公告)日：2012-01-24

    申请号：US12725954

    申请日：2010-03-17

    申请人： Pek Yew Tan ,  Wei Lih Lim ,  Shinichiro Ohmi ,  Yasuo Harada

    发明人： Pek Yew Tan ,  Wei Lih Lim ,  Shinichiro Ohmi ,  Yasuo Harada

    IPC分类号： H04Q7/00

    CPC分类号： H04W74/02 ,  H04L47/15 ,  H04L47/24 ,  H04L47/70 ,  H04L47/788 ,  H04L47/801 ,  H04L47/824 ,  H04W28/20 ,  H04W72/1236

    摘要： Method and apparatus for controlling transmission of a data stream from a station. A QoS registration frame is received, via an access point, from the station. The QoS registration frame includes information indicating a request for transmission of a data stream from the station, and information indicating a minimum required interval and a maximum required interval for an interval which is between start points of two successive durations of a medium dedication. Each duration of the medium dedication represents a time period in which the station is permitted to transmit the data stream. A schedule for the transmission of the data stream is calculated by setting a new interval which is between the minimum required interval and the maximum required interval, when the transmission is admitted. A QoS response frame, which includes information indicating the schedule, is then transmitted from the access point to the station.

    摘要翻译： 用于控制来自站的数据流的传输的方法和装置。 经由接入点从站接收QoS注册帧。 QoS注册帧包括指示来自站的数据流的传输请求的信息，以及指示中间执行的两个连续持续时间的起始点之间的间隔的最小所需间隔和最大所需间隔的信息。 媒体奉献的每个持续时间表示站被允许发送数据流的时间段。 通过在允许传输时，通过设置最小所需间隔和最大所需间隔之间的新间隔来计算数据流传输调度。 包括指示调度的信息的QoS响应帧然后从接入点发送到站。

    Abnormality detection apparatus and method for oil level sensor
    43.
    发明申请
    Abnormality detection apparatus and method for oil level sensor 有权
    油位传感器异常检测装置及方法

    公开(公告)号：US20080154477A1

    公开(公告)日：2008-06-26

    申请号：US12000176

    申请日：2007-12-10

    申请人： Tatsuhisa Yokoi ,  Yasuo Harada ,  Ryouhei Kusunoki ,  Hidetomo Horikawa ,  Ryoichi Kitaoka

    发明人： Tatsuhisa Yokoi ,  Yasuo Harada ,  Ryouhei Kusunoki ,  Hidetomo Horikawa ,  Ryoichi Kitaoka

    IPC分类号： F01M11/12

    CPC分类号： F01M1/18

    摘要： An abnormality detection apparatus for detecting an abnormality of an oil level sensor having lower and upper oil level detectors includes: a recording portion that records the output of the upper oil level detector before the internal combustion engine is started; and a determining portion that determines that the upper oil level detector has an abnormality if the output of the lower oil level detector is indicating, after the start of the internal combustion engine, that the oil level is higher than the first reference oil level while the output of the upper oil level detector recorded by the recording portion is indicating that the oil level was lower than the second reference oil level before the start of the internal combustion engine.

    摘要翻译： 一种用于检测具有下部和上部油位检测器的油位传感器的异常的异常检测装置，包括：记录部分，其在内燃机启动之前记录上部油位检测器的输出; 以及判定部，其判定上油位检测器是否具有异常，如果下油位检测器的输出指示在内燃机启动之后油位高于第一参考油位，而 由记录部分记录的上部油位检测器的输出指示在内燃机启动之前油位低于第二参考油位。

    Method for transmitting data stream via wireless medium and a wireless network
    46.
    发明申请
    Method for transmitting data stream via wireless medium and a wireless network 审中-公开
    用于经由无线介质和无线网络发送数据流的方法

    公开(公告)号：US20060099956A1

    公开(公告)日：2006-05-11

    申请号：US10541748

    申请日：2004-01-09

    申请人： Yasuo Harada ,  Kazuhiro Ando ,  Chalermphol Apichaichalermwongse ,  Pek Tan ,  Wei Lim ,  Rahul Malik

    发明人： Yasuo Harada ,  Kazuhiro Ando ,  Chalermphol Apichaichalermwongse ,  Pek Tan ,  Wei Lim ,  Rahul Malik

    IPC分类号： H04Q7/20

    CPC分类号： H04W74/02 ,  H04W28/26 ,  H04W84/12

    摘要： The present invention provides a method for transmitting data stream via wireless medium for contention based medium access across a wireless network having a plurality of stations and an access point communicating to the stations via wireless medium. The method includes: (i) transmitting data stream from the station according to prescheduled wireless medium occupancy reservation for the station within only prescheduled medium occupancy period of a selective contention period; (ii) performing a contention between the stations for wireless medium occupancy for a contention successful station to transmit data stream within only contention medium occupancy period of the selective contention period; (iii) transmitting data stream from the contention successful station after the contention; and (iv) prescheduling a wireless medium occupancy reservation for the contention successful station to transmit within a prescheduled medium occupancy period of next selective contention period.

    摘要翻译： 本发明提供了一种用于经由无线介质发送数据流的方法，用于跨越具有多个站的无线网络和经由无线介质与站通信的接入点进行基于争用的媒体接入。 该方法包括：（i）根据预选择的无线媒体占用预留从台站发送数据流，仅在选择性争用期的预定中间占用期间内; （ii）在争用成功站之间进行无线媒体占用的站之间的争用，以在所述选择性竞争期间的竞争媒体占用期间内仅发送数据流; （iii）在争用后从竞争成功站发送数据流; 以及（iv）预先规定争用成功站的无线媒体占用预约，以在下一个选择性竞争时段的预先设定的媒体占用期限内进行发送。

    Method of transmitting orthogonal frequency division multiplex signal, and transmitter and receiver employed therefor
    48.
    发明授权
    Method of transmitting orthogonal frequency division multiplex signal, and transmitter and receiver employed therefor 失效
    发送正交频分复用信号的方法及其发射机和接收机

    公开(公告)号：US5682376A

    公开(公告)日：1997-10-28

    申请号：US572719

    申请日：1995-12-14

    申请人： Hiroshi Hayashino ,  Yasuo Harada ,  Tomohiro Kimura ,  Yasuhiro Uno ,  Hiroshi Oue

    发明人： Hiroshi Hayashino ,  Yasuo Harada ,  Tomohiro Kimura ,  Yasuhiro Uno ,  Hiroshi Oue

    IPC分类号： H04L27/26 ,  H04J11/00 ,  H04L27/28

    CPC分类号： H04L27/2607 ,  H04L27/2614

    摘要： A complex multiplier complex-multiplies a carrier modulation signal group for decoding the phases and amplitudes of a plurality of carriers which are orthogonal to each other on the frequency axis by a complex signal group having a predetermined specific pattern which varies in phase at random. An inverse Fourier transformer performs inverse Fourier transformation on an output of the complex multiplier, for transforming a digital signal which is multiplexed on the frequency axis to an OFDM signal on the time axis. A guard interval insertion part adds front and rear guard intervals to front and rear parts of each symbol of the OFDM signal respectively. The front and rear guard intervals include data which are identical to those of rear and front end parts of the corresponding symbol respectively. Arithmetic processing which is reverse to that on a transmission side is performed on a receiving side, whereby distortion of received data is removed. Thus, the OFDM signal can be transmitted with no waveform distortion on a data component of each symbol on the frequency axis after Fourier transformation even if a reflected wave is superposed on a direct wave due to a multipath.

    摘要翻译： 复数乘法器复数乘法载波调制信号组，用于解码在频率轴上彼此正交的多个载波的相位和幅度，具有随机相位变化的预定特定模式的复信号组。 傅里叶逆变换器对复数乘法器的输出执行逆傅立叶变换，用于将在频率轴上复用的数字信号在时间轴上变换为OFDM信号。 保护间隔插入部分分别向OFDM信号的每个符号的前后部分添加前后保护间隔。 前后保护间隔包括与相应符号的后端部分和前端部分相同的数据。 在接收侧执行与发送侧相反的算术处理，从而去除接收数据的失真。 因此，即使由于多径而将反射波叠加在直接波上，也可以在傅立叶变换之后的频率轴上的每个符号的数据分量上不发送波形失真的OFDM信号。