Multiplex space switch

Details Multiplex space switch Multiplex space switch

1979-10-30

1982-03-16

Stewart, David L.

Multiplex communications

Wide area network

Packet switching

370 59, 370 64, 370 68, H04Q 1104

Patent

active

043205011

ABSTRACT:
The space switch has an inlet series to parallel converter (1) arranged to take sequential data from the i-th time slot of each of a plurality of synchronized inlet multiplexes and apply them simultaneously to a parallel connection (11) within one time slot period. These time slots are written into one of two signal stores (2 and 3), e.g. sequentially. A control store (4) controls the order in which data is read from the signal store and re-assembled into outlet multiplexes by a parallel to series converter (5), thereby performing space switching between the stored time slots. The signal stores alternate between reading and writing, and each has a capacity equal to the product of the number (p) of inlet multiplexes (E1, . . . Ep) multiplied by a submultiple of the number of time slots to a frame. When the submultiple is greater than 1 there is a possibility of limited time switching within a sector of successive time slots, the number of time slots in each sector being equal to the submultiple.

REFERENCES:
patent: 3263030 (1966-07-01), Stiefel
patent: 3573381 (1971-04-01), Marcus
patent: 4074077 (1978-02-01), Charransol
Fujitsu Scientific & Technical Journal; Sep. 1977; "An Adaptive Type PCM Transit Switching Network" by Tsuda et al., pp. 1-22.
International French Seminar on Digital Communications; Mar. 1976; "Limitation of Transmission Rate . . . " by Pfanschmidt, pp. C3.1 to C3.6.
IEEE International Conference on Communications; Jun. 1977; "No. 3 EAX Network and Master Clock", pp. 27.2-199 to 27.2-203.

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