-
公开(公告)号:US5987007A
公开(公告)日:1999-11-16
申请号:US800326
申请日:1997-02-14
申请人: Kim Molin , Petri Havanto , Harald Kaaja , Olavi Mertanen , Juha Pihlaja
发明人: Kim Molin , Petri Havanto , Harald Kaaja , Olavi Mertanen , Juha Pihlaja
IPC分类号: H04L12/54 , H04L12/70 , H04L12/935 , H04Q11/04 , H04L12/56
CPC分类号: H04L12/5602 , H04L49/309 , H04Q11/0478 , H04L2012/5619 , H04L2012/5636 , H04L2012/5651 , H04L2012/5652 , H04L2012/5681
摘要: A method of manipulating the header field in an ATM cell. In accordance with the method, the ATM cell is transferred via an interface where each byte of the cell appears in a parallel form on a plurality of parallel data conductors and where information on the start of cell (SOC) is also available. In order to be able to carry out header bit manipulation in a simple manner at such an interface, data conductors corresponding to the bits to be manipulated are led to a circuit carrying out the manipulation, and the other data conductors are led past the circuit. The bit to be manipulated is searched for by counting from start of cell up to the byte containing the bit to be manipulated, after which the bit is manipulated. An output conductor corresponding to the manipulated bit is led from the manipulation circuit to its own position among the data conductors that bypassed the circuit.
摘要翻译: 一种在ATM信元中操纵报头字段的方法。 根据该方法,ATM信元通过接口传送,其中单元的每个字节以并行形式出现在多个并行数据导体上,并且其中关于单元开始(SOC)的信息也是可用的。 为了能够在这样的接口处以简单的方式执行头位操作,将要处理的位对应的数据导体引导到执行操作的电路,并且其他数据导体被引导通过电路。 通过从单元开始到包含待操作的位的字节的计数来搜索待操作的位,之后对该位进行操作。 对应于被操纵的位的输出导体从旁路电路的数据导体中的操作电路引导到其自己的位置。