公开(公告)号：US20100220593A1

公开(公告)日：2010-09-02

申请号：US12599374

申请日：2009-03-31

申请人： Yuki Fujiwara ,  Yosuke Matsushita ,  Yoshio Urabe

发明人： Yuki Fujiwara ,  Yosuke Matsushita ,  Yoshio Urabe

IPC分类号： H04L12/56

CPC分类号： H04L47/10 ,  H04B2203/5445 ,  H04L47/11 ,  H04L47/122 ,  H04L47/2408 ,  H04L47/2433 ,  H04L47/2458 ,  H04L47/33

摘要： Each of PLC modems 11 through 14 that perform communication using a PLC network 1 manages a priority management table that contains, for each of a plurality of data exchanged using a common transmission line, (i) a main priority (original), (ii) a main priority (changed), and (iii) a sub-priority. For example, when the PLC modem 11 detects congestion, the PLC modem 11 searches its priority management table for a stream that has the same main priority (original) as and a lower sub-priority than data transmitted by the PLC modem 11. The PLC modem 11 then transmits, to the PLC modem that transmits the stream found as a result of the above search, a notification signal notifying that the data transmitted by the PLC modem 11 has a high sub-priority.

摘要翻译： 使用PLC网络1执行通信的PLC调制解调器11至14中的每一个管理优先级管理表，对于使用公共传输线交换的多个数据中的每一个，包含主要优先级（原始），（ii） 主要优先事项（已更改），（iii）次要优先事项。 例如，当PLC调制解调器11检测到拥塞时，PLC调制解调器11在其​​优先级管理表中搜索与PLC调制解调器11发送的数据相同的主要优先级（原始）和较低的子优先级的流.PLC 调制解调器11然后向作为上述搜索结果发送的流的PLC调制解调器发送通知PLC调制解调器11发送的数据具有高次优先级的通知信号。

公开(公告)号：US20090141836A1

公开(公告)日：2009-06-04

申请号：US10582765

申请日：2005-04-12

申请人： Naganori Shirakata ,  Yukihiro Omoto ,  Yoshio Urabe ,  Yasuo Harada

发明人： Naganori Shirakata ,  Yukihiro Omoto ,  Yoshio Urabe ,  Yasuo Harada

IPC分类号： H04L27/06

CPC分类号： H04L27/266 ,  H04L27/2613 ,  H04L27/2642 ,  H04L27/2659 ,  H04L27/2662 ,  H04L27/2675 ,  H04L27/2679 ,  H04L2027/0067 ,  H04L2027/0095

摘要： A reception device according to the present invention receives a transmission frame including a synchronization symbol string, having a synchronization symbol repeated multiple times, inserted before a data symbol string. The synchronization symbol is obtained by synthesizing a plurality of sub band symbols which are mutually orthogonal and having different carrier frequencies. The carrier frequencies of the sub band symbols are located at an equal predetermined frequency interval. The synchronization symbol includes a repeated synchronization pattern. The reception device detects a rough carrier frequency error from a phase difference of a synchronization pattern correlation value to correct the frequency, and then detects a residual frequency error from an inter-symbol phase difference of each sub band to correct the frequency. The reception device detects a sampling clock frequency error from an inter-sub band phase difference to correct the frequency. Thus, the demodulation error of the data symbol is reduced.

摘要翻译： 根据本发明的接收装置在数据符号串之前接收包括具有重复多次的同步符号的同步符号串的传输帧。 通过合成相互正交且具有不同载波频率的多个子带符号来获得同步符号。 子带符号的载波频率位于相等的预定频率间隔。 同步符号包括重复的同步模式。 接收装置根据同步模式相关值的相位差检测粗略载波频率误差，以校正频率，然后从每个子带的符号间相位差检测残留频率误差，以校正频率。 接收装置从子频带相位差检测采样时钟频率误差，以校正频率。 因此，减少数据符号的解调错误。