Multiplex communications – Wide area network – Packet switching
Patent
1983-08-19
1985-08-13
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 84, H04Q 1104
Patent
active
045354464
ABSTRACT:
An aligner with a time switching capability is disclosed. The aligner has a store for storing incoming data. The store is sufficiently large that it can hold more than one frame of information. Data is written into the store under the control of clock signals associated with the incoming data. Data is read from the store under the control of a local clock. Read addresses are generated by a unit which is so arranged that if a clash between the current write address and the generated read address is sensed to be imminent, reading of the corresponding address in the previous or subsequent frame occurs. Thus, the aligner can operate as a time switch and clashes between reading and writing are avoided by allowing slippage of one frame.
REFERENCES:
patent: 3637941 (1972-07-01), Rekiere
patent: 3773978 (1973-10-01), LeRoy
patent: 4207435 (1980-06-01), Okada et al.
patent: 4224474 (1980-09-01), Savit
patent: 4312063 (1982-01-01), Warner
Electronics and Communications in Japan, vol. 49, No. 11, Nov. 1966, pp. 118-128, IEEE, Washington, US, T. Osatake et al: "4. PCM Switching System"-p. 124; FIG. 12; p. 126, FIG. 19 and right-hand column, lines 31-35.
Processings of the IEEE, vol. 65, No. 9, Sep. 1977, pp. 1295-1304, New York, US, S. Tominta et al: "Some Aspects of Time-Division Data Switch Design"-p. 1303, left-hand column, paragraph: A. Transmission Interface.
Review of Electrical Communication Laboratories, vol. 28, Nos. 5-6, May-Jun. 1980, pp. 328-337, Tokyo, JP, T. Arita et al: "Digital Data Switching Network"-p. 330, left-hand column, lines 3-6; p. 331, right-hand column.
Colloque International de Commutation Electronique, Mar. 28-Apr. 2, 1966, pp. 513-520, Edition Chiron, Paris, FR, W. Neu et al: "Commutation Temporelle: Techniques"-p. 516, lines 3-8.
British Telecommunications
Olms Douglas W.
Rokoff Kenneth I.
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