发明名称 |
DATA TRANSMISSION SYSTEM, DATA TRANSMITTER, AND TRANSMITTING METHOD |
摘要 |
<p>In the case where transmission and reception is made impossible at a certain portion, a data transmission system configured in a ring LAN performs an initialization process for a physical layer (a transmission/reception section 4) repeatedly, thereby setting as a master a data transmission device which is located most upstream in electrical communication from a disconnection point. With that data transmission device being the master, an initial setting of the physical layer such as a clock synchronization with another data transmission device or the like is established, and an initialization process for a data link layer is performed, whereby subsequent data transmission and reception is enabled. That is, the data transmission system configured in a ring LAN is able to perform communication using transmission lines excluding a damaged point even in the case where transmission and reception is made impossible at a certain portion.</p> |
申请公布号 |
EP1681810(A1) |
申请公布日期 |
2006.07.19 |
申请号 |
EP20040706319 |
申请日期 |
2004.01.29 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
AKITA, TAKASHI;KATTA, NOBORU;YASUI, NOBUHIKO;SAKAI, TAKAHISA;MIZUGUCHI, YUJI;TAKAHIRA, YUTAKA;KAWADA, HIROTSUGU;UMEI, TOSHITOMO |
分类号 |
H04L12/437;(IPC1-7):H04L12/42 |
主分类号 |
H04L12/437 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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