Multiplex communications – Wide area network – Packet switching
Patent
1993-11-05
1994-08-30
Hsu, Alpus H.
Multiplex communications
Wide area network
Packet switching
370108, 375112, 375118, 369 60, 36518905, H04J 306, H04L 704
Patent
active
053434765
ABSTRACT:
A digital transmission system having at least one adaptation circuit for compensating for phase variations of a STM-N signal. For inserting justification locations for at least one container of the STM-N signal, the adaptation circuit (8) includes a buffer (17, 51), a write address generator (16, 53), a read address generator (18, 61) a justification decision circuit (24, 60) and an output circuit (19, 62). The buffer stores container data in which justification locations may be inserted. The write address generator provides write addresses for data to be written in the buffer, and the read address generator provides read addresses in the buffer. In one embodiment differences between the read and write address values are combined with justification information which has been low pass filtered. In another embodiment these differences are low pass filtered and used for forming the justification decision signal. The output circuit inserts positive or negative justification locations in data read from the buffer to form the container.
REFERENCES:
patent: 4791652 (1988-12-01), McEachern et al.
patent: 4811340 (1989-03-01), McEachern et al.
patent: 4891788 (1990-01-01), Kreifels
patent: 4928275 (1990-05-01), Moore et al.
patent: 5123010 (1992-06-01), Pospischil
patent: 5131013 (1992-07-01), Choi
patent: 5157655 (1992-10-01), Hamlin, Jr et al.
patent: 5168494 (1992-12-01), Mueller
"Jitter bei der Ubertragung plesiochroner Signale in der SDH", by Miguel Robledo and Ralph Urbansky, PKI Techn. Mitt. Mar. 1989, pp. 31-38.
CCIT Recommendation G707, G708, G709, pp. 107-173.
Hsu Alpus H.
Treacy David R.
U.S. Philips Corporation
LandOfFree
Transmission system for the synchronous digital hierarchy does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transmission system for the synchronous digital hierarchy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmission system for the synchronous digital hierarchy will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-35092