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    • 5. 发明申请
    • System for and method of providing a header and a trailer in data packets
    • 在数据包中提供标题和预告片的系统和方法
    • US20050254491A1
    • 2005-11-17
    • US11157718
    • 2005-06-21
    • John LenellDavid FisherAndrew Castellano
    • John LenellDavid FisherAndrew Castellano
    • H04J3/06H04L7/04H04L12/56H04L29/06
    • H04L12/5601H04J3/0608H04L7/042H04L49/455H04L69/12H04L69/22H04L2012/5679
    • Each packet normally consists of a preamble, start-of-frame delimiter and data. The preamble has nibbles each having a particular format. A header substituted for preamble nibbles by an individual one of the originating devices in a plurality, and an individual one of the ports in such originating device, indicates such originating device and such port. Such port in such originating device sends such modified packet to others of the originating devices and to an observing station. The header format is such that the last nibble in the header and the remaining preamble portion will not be confused with any two (2) nibbles in the header. A particular one of the originating devices indicated in the data converts the header back to the preamble format and transmits the converted packet to a receiving station. The observing station records the individual originating device, and the individual port in such device, indicated in the header. Each packet includes at its end a trailer formed from a plurality of nibbles and indicating whether or not a collision has occurred between such packet and a packet from another one of the originating devices. The trailer in each packet may also indicate additional information—e.g. whether the packet (a) is a normal packet originally formed, (b) is a runt packet, (c) is from an unacceptable source and (d) the delay between each packet end and the next packet start. The information in the trailer for each packet passes to the observing station.
    • 每个分组通常由前导码,帧起始分隔符和数据组成。 前导码具有各自具有特定格式的半字节。 由多个发端设备中的一个单独的一个替换前同步码的头部以及这种始发设备中的各个端口中的单独的一个表示这种始发设备和这样的端口。 这种始发设备中的这种端口将这种修改的分组发送到始发设备的其他设备和观测站。 标题格式使得报头和剩余前导码部分中的最后一个半字节不会与报头中的任何两个(2)半字节混淆。 数据中指示的特定一个始发设备将报头转换回前导码格式并将转换的分组发送到接收站。 观察站记录单个发起设备,以及在该设备中的单个端口,标题中指示。 每个分组在其末尾包括由多个半字节形成的预告,并且指示在这样的分组与来自另一个始发设备的分组之间是否发生了冲突。 每个分组中的预告片也可以指示附加信息 - 例如 分组(a)是否是原始形成的正常分组,(b)是分组分组,(c)来自不可接受的源,(d)每个分组结束与下一个分组开始之间的延迟。 每个包的预告片中的信息传递到观察站。