Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2005-04-19
2005-04-19
Nguyen, Brian (Department: 2661)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S504000, C370S236000, C370S382000, C370S383000, C710S061000
Reexamination Certificate
active
06882661
ABSTRACT:
A system transfers a data stream including data packets separated by non-packet words from a first clock domain to a second clock domain. It includes an elasticity buffer into which the data stream is written in a cyclic sequence under the control of the clock frequency in the first clock domain and from which the data stream is read out in a cyclic sequence under the control of the clock frequency in the second domain. The two sequences are monitored to provide an anticipatory signal indicating that the reading sequence approaches proximity to the writing sequence. A non-packet word is inserted into the data stream in the first domain. In the second clock domain the existence of the inserted non-packet word is detected and the buffer is caused to advance the reading cycle thereby to discard the said inserted non-packet word.
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Casey Fergus
Creedon Tadhg
De Paor Denise
3Com Corporation
Moore Ian N.
Nguyen Brian
Nixon & Vanderhye P.C.
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