Time division switching network for switching multirate multiple

Details Time division switching network for switching multirate multiple Time division switching network for switching multirate multiple

1975-12-29

1976-10-19

Stewart, David L.

179 15AT, H04Q 1104

Patent

active

039872513

ABSTRACT:
A time division digital switching network comprises first multiplexing means in which first-order digital data channels transmitting words consisting of a given number of bits and having first rates which are different from, but multiple of, one another undergo a first multiplexing converting them into a second-order digital data channel having a second predetermined rate. Each given second-order channel comprises a combination of first-order channels having different rates r.sub.1. In each combination, there are x.sub.i words at the rate x.sub.i and the quantity .SIGMA.r.sub.i x.sub.i defines a multiframe. Thereafter there are provided second multiplexing means in which the second-order digital channels undergo a second multiplexing converting them into a third-order digital data channel having a third predetermined rate. In a digital switching unit having at least one buffer store, the first-order channel words multiplexed into the third-order channel are grouped at an address whose first part depends upon the second-order channel they occupy in the third-order channel and whose second part is derived from the word number in the multiframe. The word number in the multiframe corresponds to a given first-order channel according to the schedule of multiplexing. The bits of a given rank of the words of a second-order channel form a pseudorandom sequence having a known period and, therefore, the bits of a given rank of the words of a third-order channel form a number of interleaved pseudorandom sequences. The digital switching unit includes means for separating these interleaved pseudorandom sequences and for deducting from the bits composing them the second part of the address of the words and from the latter the addresses of the first-order channels.

REFERENCES:
patent: 3535450 (1970-10-01), Vollmeyer
patent: 3794768 (1974-02-01), Carney
patent: 3890469 (1975-06-01), Kelly
patent: 3894189 (1975-07-01), Edstrom
patent: 3922494 (1975-11-01), Cooper
patent: 3952162 (1976-04-01), Texier

Affiliated with

Also associated with

Rating

Time division switching network for switching multirate multiple does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Time division switching network for switching multirate multiple, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time division switching network for switching multirate multiple will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-103796