Using error checking bits to communicated an address or other bits
    92.
    发明授权
    Using error checking bits to communicated an address or other bits 有权
    使用错误检查位传送地址或其他位

    公开(公告)号:US07281187B2

    公开(公告)日:2007-10-09

    申请号:US10720016

    申请日:2003-11-20

    IPC分类号: H03M13/00

    摘要: A method of operating in a network in which a plurality of stations communicate over a shared medium. The method comprises transmitting a group of bits from a transmitting station to a receiving station, wherein the group of bits comprises information bits and error checking bits, and communicating additional bits from the transmitting station to the receiving station without transmitting the additional bits. Communicating the additional bits comprises, at the transmitting station, deriving the error checking bits from the additional bits using an error checking process; and at the receiving station, using the same or a related error checking process to process candidate bits known to the receiving station, and comparing the output of the error checking process to the error checking bits received from the transmitting station to determine if the candidate bits correspond to the additional bits.

    摘要翻译: 一种在多个站通过共享介质通信的网络中操作的方法。 该方法包括从发送站向接收站发送一组比特,其中,所述比特组包括信息比特和错误校验比特,并且在不发送附加比特的情况下将附加比特从发射台传送到接收站。 在发送站处通信附加比特包括使用错误检查过程从附加比特中导出错误校验比特; 并且在接收站处,使用相同或相关的错误检查处理来处理接收站已知的候选比特,并将错误检查处理的输出与从发送站接收的错误校验比特进行比较,以确定候选比特 对应于附加位。

    Multicast and broadcast transmission with partial ARQ
    94.
    发明授权
    Multicast and broadcast transmission with partial ARQ 有权
    具有部分ARQ的组播和广播传输

    公开(公告)号:US06522650B1

    公开(公告)日:2003-02-18

    申请号:US09632595

    申请日:2000-08-04

    IPC分类号: H04L1228

    摘要: A partial ARQ protocol for multicast and broadcast transmissions in network devices operating in a shared medium access network. To support the partial ARQ, a media access control (MAC) protocol uses robustly transmitted frame delimiters and a MAC management frame structure. In a multicast or broadcast frame with partial ARQ, a destination address field is set to that of a selected proxy device's address, and the address of the intended recipients (of group address of the intended recipients) is placed in an entry in the MAC management frame structure. The frame also contains a multicast flag set to indicate that the transmission is intended for more than one device and a value in the frame delimiters to indicate that a response is requested. Upon receipt of such a frame, the proxy device specified by the destination address field provides an appropriate response type on behalf of the group. The non-proxy recipients, detecting the multicast flag setting, know to ignore the DA in the destination address field and instead look to the MAC management entry for actual destination addresses.

    摘要翻译: 用于在共享介质接入网络中操作的网络设备中的组播和广播传输的部分ARQ协议。 为了支持部分ARQ,媒体访问控制(MAC)协议使用鲁棒传输的帧分隔符和MAC管理帧结构。 在具有部分ARQ的多播或广播帧中,将目的地地址字段设置为所选代理设备地址的目的地址字段,并且将预期接收者(预期接收者的组地址的地址)放置在MAC管理中的条目中 框架结构。 帧还包含设置为指示传输是针对多于一个设备的多播标志,并且帧分隔符中的值指示响应被请求。 在接收到这样的帧时,由目的地地址字段指定的代理设备代表该组提供适当的响应类型。 检测多播标志设置的非代理收件人知道忽略目的地址字段中的DA,而是查看MAC管理条目的实际目的地址。

    Enhanced channel estimation
    95.
    发明授权
    Enhanced channel estimation 有权
    增强信道估计

    公开(公告)号:US06442129B1

    公开(公告)日:2002-08-27

    申请号:US09455110

    申请日:1999-12-06

    IPC分类号: H04J900

    CPC分类号: H04L27/2608

    摘要: A scheme for identifying usable carriers for a particular modulation type and selecting, if possible, a modulation type for modulation of OFDM symbol block associated with data packets in a standard transmission mode based on data channel conditions. Channel estimation for an OFDM symbol block received by a receiving network node over a data channel during a packet transmission by a transmitting network node generates information indicative of noise events on symbols and carriers in the OFDM block, the generated information being related to modulation types available for the standard transmission mode, and determines from the generated information if at least one of the modulation types available for the standard transmission mode may be used for a next data transmission over the data channel by the transmitting network node using the standard transmission mode. One of the modulation types is selected if it is determined that at least one of the modulation types may be used. A channel map identifying good carriers for the selected modulation type is produced and stored in memory. If it is determined that one of the modulation modes for the standard transmission mode may not be selected, then a robust transmission mode is chosen instead. The robust transmission mode transmits more reliably (albeit at a lower data rate) than the standard transmission mode. The channel map associated with the standard transmission mode,if produced, or the selection of the robust transmission mode is conveyed to the transmitting network node.

    摘要翻译: 用于识别用于特定调制类型的可用载波的方案,并且如果可能,则基于数据信道条件选择用于以标准传输模式调制与数据分组相关联的OFDM符号块的调制类型。 在发送网络节点的分组传输期间由接收网络节点通过数据信道接收的OFDM符号块的信道估计产生指示OFDM块中的符号和载波上的噪声事件的信息,所生成的信息与可用的调制类型相关 并且根据所生成的信息确定可用于标准传输模式的调制类型中的至少一个可以被发送网络节点使用标准传输模式通过数据信道进行下一次数据传输。 如果确定可以使用至少一种调制类型,则选择调制类型之一。 产生识别用于所选择的调制类型的良好载波的频道映射并将其存储在存储器中。 如果确定可能不选择用于标准传输模式的调制模式之一,则选择鲁棒的传输模式。 鲁棒的传输模式比标准传输模式更可靠地发送(尽管数据速率较低)。 与标准传输模式相关联的信道映射(如果产生)或鲁棒传输模式的选择被传送到发射网络节点。

    Robust transmission mode
    96.
    发明授权
    Robust transmission mode 有权
    稳健的传输模式

    公开(公告)号:US06278685B1

    公开(公告)日:2001-08-21

    申请号:US09377131

    申请日:1999-08-19

    IPC分类号: H04J1100

    摘要: An interleaving/de-interleaving scheme for providing redundancy with both time and frequency diversity to data in OFDM symbols in a data transmission system. On the transmit side, encoded data to be modulated onto carriers in OFDM symbols is interleaved by storing the encoded data in an interleaver memory and reading multiple copies of the encoded data from the interleaver memory so that the encoded data copies are spread in time on non-consecutive symbols and in frequency on non-adjacent carriers. On the receive side, the multiple copies of the OFDM data are received, and phase noise computations are used to combine the multiple copies (in either metric or phase angle form) into one. From the combined copies a single metric value to be used in decoding the OFDM data is produced.

    摘要翻译: 一种用于向数据传输系统中的OFDM符号中的数据提供时间和频率分集的冗余的交织/解交织方案。 在发送侧,通过将编码数据存储在交织器存储器中并从交织器存储器中读取编码数据的多个副本来交织编码数据,以便编码的数据副本在非OFDM码元中以时间方式传播, - 不相邻载波上的连续符号和频率。 在接收侧,接收OFDM数据的多个副本,并且使用相位噪声计算将多个副本(以度量或相位角形式)组合成一个。 从组合副本中,产生用于解码OFDM数据的单个度量值。

    Windowing function for maintaining orthogonality of channels in the reception of OFDM symbols
    97.
    发明授权
    Windowing function for maintaining orthogonality of channels in the reception of OFDM symbols 有权
    用于在OFDM符号的接收中维持信道的正交性的窗口功能

    公开(公告)号:US06269132B1

    公开(公告)日:2001-07-31

    申请号:US09299810

    申请日:1999-04-26

    IPC分类号: H03D104

    CPC分类号: H04L27/265

    摘要: A windowing mechanism for processing an OFDM symbol is presented. The windowing mechanism applies an apodizing window function having the property Wj+W(FFTSize/2 +j)=constant, where FFTSize is the size of the FFT sample, to a received OFDM symbol sample and a time-offset version of the OFDM symbol sample to produce sets of windowed values. The time-offset sample is offset from the original symbol by one half the symbol period. The time-offset windowed sample is shifted into realignment with the windowed original symbol. Corresponding ones of the windowed values are summed together to restore the windowed symbol to its original form.

    摘要翻译: 提出了一种用于处理OFDM符号的开窗机制。 开窗机制应用具有属性Wj + W(FFTSize / 2 + j)=常数的变迹窗函数,其中FFTSize是FFT样本的大小,到接收的OFDM符号采样和OFDM符号的时间偏移版本 样本以产生窗口值的集合。 时间偏移采样与原始符号偏移了符号周期的一半。 时间偏移窗口样本被移入与窗口原始符号重新对齐。 将相应的窗口值相加在一起以将窗口符号恢复到其原始形式。

    Distributed bandwidth control in a communication network
    99.
    发明授权
    Distributed bandwidth control in a communication network 有权
    通信网络中的分布式带宽控制

    公开(公告)号:US09065668B1

    公开(公告)日:2015-06-23

    申请号:US13019775

    申请日:2011-02-02

    IPC分类号: G01R31/08 H04L12/26

    摘要: Network devices of a particular device class can implement a distributed bandwidth control (DBC) protocol to utilize resources of a communication network in accordance with a threshold amount of resources allocated for DBC device communication. A DBC device of a plurality of DBC devices can determine a transmission cost associated with a pending DBC transmission. The pending DBC transmission is initiated. A delay time period associated with the initiated pending DBC transmission can be calculated based, at least in part, on the transmission cost associated with the initiated DBC pending transmission and a threshold transmission cost associated with DBC device communications. Subsequent transmissions of the DBC device and all other DBC devices in the communication network can be delayed by at least the delay time period associated with the initiated pending DBC transmission of the DBC device.

    摘要翻译: 特定设备类的网络设备可以根据分配给DBC设备通信的资源的阈值量来实现分布式带宽控制(DBC)协议以利用通信网络的资源。 多个DBC设备的DBC设备可以确定与待处理的DBC传输相关联的传输成本。 启动待处理的DBC传输。 可以至少部分地基于与发起的DBC等待传输相关联的传输成本和与DBC设备通信相关联的阈值传输成本来计算与发起的未决DBC传输相关联的延迟时间段。 DBC设备和通信网络中的所有其他DBC设备的后续传输可以延迟至少与DBC设备的发起的未决DBC传输相关联的延迟时间段。

    Establishing a power charging association on a powerline network
    100.
    发明授权
    Establishing a power charging association on a powerline network 有权
    在电力线网络上建立电力充电协会

    公开(公告)号:US09026813B2

    公开(公告)日:2015-05-05

    申请号:US12980758

    申请日:2010-12-29

    摘要: Associating service agents in communication over a network to one or more respective clients coupled to the network at respective ports of the network is described. At a first service agent, a first signal is received from a first client coupled to the network at a first port. The first signal propagates over a first signal propagation path between the first service agent and the first port. An association between the first service agent and the first client is established based at least in part on a difference between: the first signal propagation path between the first service agent and the first port, and a second signal propagation path between the first service agent and a second port or between a second service agent and the first port.

    摘要翻译: 描述了通过网络将服务代理关联到在网络的相应端口处耦合到网络的一个或多个相应客户端。 在第一服务代理处,从在第一端口处耦合到网络的第一客户端接收第一信号。 第一信号在第一服务代理和第一端口之间的第一信号传播路径上传播。 至少部分地基于第一服务代理和第一端口之间的第一信号传播路径和第一服务代理与第一服务代理与第一客户端之间的第二信号传播路径之间的差异来建立第一服务代理和第一客户端之间的关联 第二端口或第二服务代理和第一端口之间。