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11. 发明授权

US5327534A Detection of duplicate alias addresses 失效
标题翻译：检测重复的别名地址
公开(公告)号：US5327534A
公开(公告)日：1994-07-05
申请号：US559031
申请日：1990-07-30
申请人： Jerry D. Hutchison , Henry S. Yang
发明人： Jerry D. Hutchison , Henry S. Yang
IPC分类号： H04L12/24 , H04L12/433 , H04L29/12 , G06F12/00
CPC分类号： H04L29/12264 , H04L12/24 , H04L12/433 , H04L29/12801 , H04L29/12839 , H04L41/00 , H04L61/2046 , H04L61/6004 , H04L61/6022
摘要： A duplicate address condition in a computer network may be detected by a station of the type for attachment to a computer communications network, the network capable of maintaining communications among a plurality of stations, the station having means for receiving a frame, the frame having a source address field and a frame control field; means for maintaining an individual address of the station; means for maintaining a source address list of address, the source address list not containing the individual address; means for determining that a contents of the source address field in the frame matches at least one address in the source address list; means for determining that the frame control field of the frame has a predetermined contents; and, means, responsive to the source address of the frame matching at least one address in the source address list and the frame control field of the frame having the predetermined value, for setting an indicator that a duplicate address condition exists. The predetermined contents of the frame control field further comprises an indication that the frame is a predetermined type of control frame. The predetermined type of claim may be a beacon frame, a claim frame, or some other MAC protocol frame. The list of alias addresses may be stored in a content addressable memory. A cyclical redundancy check may be used for determining that bits from the source address field and bits from the frame control field are error free.
摘要翻译：计算机网络中的重复地址条件可以由用于附接到计算机通信网络的类型的站来检测，该站能够维持多个站之间的通信，该站具有用于接收帧的装置，该帧具有一个源地址字段和帧控制字段; 维护车站个人地址的手段; 用于维护地址列表的源地址列表，源地址列表不包含单个地址; 用于确定所述帧中的源地址字段的内容与所述源地址列表中的至少一个地址匹配的装置; 用于确定帧的帧控制字段具有预定内容的装置; 以及响应于与源地址列表中的至少一个地址匹配的帧的源地址和具有预定值的帧的帧控制字段的装置，用于设置存在重复地址条件的指示符。帧控制字段的预定内容还包括该帧是预定类型的控制帧的指示。预定类型的权利要求可以是信标帧，声明帧或一些其他MAC协议帧。别名地址列表可以存储在内容可寻址存储器中。可以使用循环冗余校验来确定来自源地址字段的位和来自帧控制字段的位是无错误的。

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