Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Patent
1998-01-20
2000-10-24
Nguyen, Chau
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
375365, H04J 306
Patent
active
061378100
ABSTRACT:
A method and system align frames of a digital link which interconnects two entities. Frames in which overhead is interleaved with payload are considered. The frame alignment is executed in two phases such that the actual frame alignment, in which a predetermined frame alignment word (FAW) is found, is preceded by a procedure called `column alignment`. The idea with column alignment is to find the positions for the overhead columns or overhead bits of a pending frame of payload and interleaved overhead. During column alignment the transmitting entity will send an easily detectable column alignment word (CAW) and the receiving entity will quickly recognize the overhead bit positions in the interleaved frame. When the positions for the overhead bits have been detected, the transmitting entity will start to send Normal Frames and the receiving entity will gain final frame alignment by finding the FAW in the overhead bit positions.
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Bjurel Jonas Bertil
Stenkvist Erik Anders
Nguyen Chau
Schuppner Suibel M. H.
Telefonaktiebolaget LM Ericsson
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