Higher-order multiplex digital communication system with identif

Details Higher-order multiplex digital communication system with identif Higher-order multiplex digital communication system with identif

1987-03-04

1988-02-23

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

3701101, 370 91, H04J 302

Patent

active

047275421

ABSTRACT:
On multiplexing a predetermined number of lower-order multiplex digital transmission signals of a common frame period into a higher-order multiplex digital communication signal, an identification pattern (X, Y, Z) is inserted in each frame of each transmission signal. The identification patterns are specific to the respective transmission signals. The identification patterns in each frame period of the respective transmission signals are multiplexed into a single pattern (I1x, I2x, I3x, I1y, I2y, I3y, I1z, I2z, I3z) in the communication signal and used to indicate lower-order multiplex digital signal receivers to which the respective transmission signals should be directed. After the communication signal is demultiplexed into lower-order multiplex digital reception signals, the identification patterns are detected with frame synchronism established between the lower-order transmission and reception signals. Each identification pattern may consist of a preselected number of binary bits where two to the power of the preselected number should not be less than the predetermined number.

REFERENCES:
patent: Re29215 (1977-05-01), Carney et al.
patent: 4160128 (1979-07-01), Texier
patent: 4244046 (1981-01-01), Brouard et al.
patent: 4271508 (1981-06-01), Schenk
patent: 4504943 (1985-03-01), Nagano et al.
patent: 4616361 (1986-10-01), Strehl
"A New Range of Digital Transmission Equipment" by Hardwick et al., Systems Technology, Sep. 1979, No. 32, pp. 48-52.
"Higher-Order Digital Multiplexors" by Hamacher et al., Ericsson Review, No. 4, 1981, vol. 58.

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