Process for the frame synchronization of a time division multipl

Details Process for the frame synchronization of a time division multipl Process for the frame synchronization of a time division multipl

1979-03-06

1981-06-30

Stewart, David L.

Multiplex communications

Wide area network

Packet switching

370105, 370106, H04J 306

Patent

active

042766427

ABSTRACT:
A process is disclosed for frame synchronization in a time division multiplex system which, while ensuring a high degree of synchronization reliability, requires only a small transmission capacity. In accordance with the invention, before a synchronous state is reached, a synchronization alarm (SA=1) is given and the recognition of two consecutive synchronizing words (100010) defines the beginning of a test period (P). If synchronizing words (100010) are constantly received during this test period (P), the synchronization alarm (SA=1) is disconnected. If only one single synchronizing word (100010) is not recognized during the test period (P), the synchronization alarm continues. Commencing from the synchronous state, the synchronization alarm is given if a plurality of synchronizing words are not recognized (FIGS. 3 to 6).

REFERENCES:
patent: 3576947 (1971-05-01), Kruger
patent: 3603735 (1971-09-01), Cleobury
patent: 3689699 (1972-09-01), Brenig
patent: 4016368 (1977-04-01), Apple
patent: 4142070 (1979-02-01), Landaver
patent: 4154984 (1979-05-01), Murasov

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