Method of and arrangement for controlling access to a time-divis

Details Method of and arrangement for controlling access to a time-divis Method of and arrangement for controlling access to a time-divis

1984-01-10

1986-05-27

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 89, 370 94, H04J 300, H04J 316

Patent

active

045920494

ABSTRACT:
Method the transmission of data packets in a TDM transmission loop wherein the frame is subdivided into several groups each having the same number of words, and each group comprises either exclusively narrow-band channels for the transmission of speech data or is associated with the high-rate channel for groups comprising narrow-band channels always comprises an unambiguous bit sample of, for example, the highest priority is assigned to each group. When a subscriber station wants access to a word group in the high-rate channel it transmits its own identifying bit sample and possibly priority data in a signaling word. When this bit sample is returned through the loop undisturbed the subscriber station immediately accesses the assigned group of words in the high-rate channel for the transmission of a data packet. Allocation of channel access among individual subscriber stations is prioritized. The bit samples identifying groups comprising narrow-band channels receive the highest priority, so that these channels are automatically protected from access as a high-rate channel. A central control unit can increase the number of narrow-band channels by transmitting a further group of identifying bit samples in the signaling word.

REFERENCES:
patent: 3863220 (1975-01-01), Osawa et al.
patent: 4154983 (1979-04-01), Pederson
patent: 4225753 (1980-09-01), Chown et al.
patent: 4320467 (1982-03-01), Glass
patent: 4357700 (1982-11-01), Alvarez, III et al.
patent: 4432054 (1984-02-01), Okada et al.
patent: 4488218 (1984-12-01), Grimes

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