公开(公告)号：WO2008032878A1

公开(公告)日：2008-03-20

申请号：PCT/JP2007/068486

申请日：2007-09-14

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. ,  YOKOMITSU, Yasushi ,  YAO, Akio ,  IGATA, Yuji ,  MAEHARA, Noriaki

Inventor： YOKOMITSU, Yasushi ,  YAO, Akio ,  IGATA, Yuji ,  MAEHARA, Noriaki

IPC: H04B3/58

CPC classification number: H04B3/58

Abstract: A power line communication apparatus transmits a signal to a first power line communication apparatus through a power line connecting to a second power line communication apparatus. The power line communication apparatus includes an information retriever for retrieving transmission rate information indicating both a first transmission rate and second transmission rate. The first transmission rate correspond to a first path of the power line along which the signal is directly transmitted to the first power line communication apparatus, and the second transmission rate corresponds to a second path of the power line along which the signal is transmitted through the second power line communication apparatus to the first power line communication apparatus. A selector selects, based on the transmission rate information, a path corresponding to a higher transmission rate among the first and second paths. A transmitter transmits the signal through the selected path.

Abstract translation: 电力线通信装置通过连接到第二电力线通信装置的电力线路向第一电力线通信装置发送信号。 电力线通信装置包括用于检索指示第一传输速率和第二传输速率两者的传输速率信息的信息检索器。 第一传输速率对应于电力线的第一路径，信号直接传输到第一电力线通信装置，第二传输速率对应于电力线的第二路径，沿着该路径发送信号通过 第二电力线通信装置。 选择器基于传输速率信息选择与第一和第二路径中较高传输速率相对应的路径。 发射机通过选择的路径发送信号。

公开(公告)号：WO2004095807A1

公开(公告)日：2004-11-04

申请号：PCT/JP2004/005730

申请日：2004-04-21

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD. ,  YOKOMITSU, Yasushi ,  YAO, Akio ,  HAMASAKI, Toshiyuki ,  KONISHI, Hiroshi ,  SHIGYO, Masahiro ,  MITSUNAGA, Yuji ,  WASHITANI, Kiminori ,  NAGAO, Hideaki

Inventor： YOKOMITSU, Yasushi ,  YAO, Akio ,  HAMASAKI, Toshiyuki ,  KONISHI, Hiroshi ,  SHIGYO, Masahiro ,  MITSUNAGA, Yuji ,  WASHITANI, Kiminori ,  NAGAO, Hideaki

IPC: H04L29/12

CPC classification number: H04L61/2514 ,  H04L29/12009 ,  H04L29/12367 ,  H04L29/12377 ,  H04L29/12462 ,  H04L29/12471 ,  H04L29/12924 ,  H04L61/2517 ,  H04L61/255 ,  H04L61/2553 ,  H04L61/6063

Abstract: The present invention provides a repeater which automatically closes a dynamically opened port in accordance with prior setting, the repeater including: a port mapping table where a global IP address and an external port number, or an external port number on the Internet is associated with a local IP address and an internal port number of a terminal connected to a LAN; a control unit which, receiving a communications packet to which an external port number is specified, converts the external port number to an internal port number based on the port mapping table and transfers the internal port number to the LAN; a timer unit which counts the unoccupied time of the port after transferring a communications packet to which an external port number is specified; and a port management unit which checks whether the registered machine is present on the LAN and in case it is absent, deletes registration concerning the external port number from the port mapping table.

Abstract translation: 本发明提供了一种根据先前设置自动关闭动态打开的端口的中继器，所述中继器包括：端口映射表，其中全球IP地址和外部端口号或Internet上的外部端口号与 本地IP地址和连接到LAN的终端的内部端口号; 控制单元，其接收指定了外部端口号的通信包，基于所述端口映射表将所述外部端口号转换为内部端口号，并将所述内部端口号传送到所述LAN; 定时器单元，其在传送指定了外部端口号的通信分组之后对所述端口的未占用时间进行计数; 以及端口管理单元，其检查登记的机器是否存在于LAN上，并且在不存在的情况下，从端口映射表中删除关于外部端口号的注册。