System for adjusting signal transmission timing in time-division

Details System for adjusting signal transmission timing in time-division System for adjusting signal transmission timing in time-division

1985-12-18

1987-09-15

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 13, 370 14, H04J 302, H04J 116

Patent

active

046944532

ABSTRACT:
A time-division multiplexing communication network comprising a central station and a plurality of local stations, in which information signals are transmitted from the local stations to the central station on a time-division multiplexing basis, and the central station transmits information signals to the local stations on a time-division multiplexing basis. The central station sequentially requests that local stations transmit a test signal in order to prevent collision of transmission signals from the local stations. Each local station, of which a test signal transmission is requested, transmits the test signal to the central station. The central station sends back the test signal to the local station which transmitted this test signal. The local station measures transmission delay time from transmission to reception of the test signal, and adjusts transmission timing of the information signal to be transmitted to the central station based on the measured delay time.

REFERENCES:
patent: 4562573 (1985-12-01), Murano et al.
patent: 4569042 (1986-02-01), Larson
patent: 4594705 (1986-06-01), Yahata et al.
Digest of Papers Compcon 82, 24th IEEE Computer Society International Conference, Feb. 22-25, 1982, pp. 182-186, The Institute of Electrical and Electronics Engineers, Inc., New York, U.S.; I. Kong, et al.: "Cablenet: A Local Area Network Reservation Scheme", *p. 185, right hand column, lines 4-46*.
IEEE International Conference on Communications, vol. 3, Jun. 13-17, 1982, pp. 6C.1.1-6C.1.5, New York, U.S.: J. O. Limb; "High-Speed Operation of Broadcast Local Networks", *p. 6C.1.2, left-hand column, line 33-p. 6C.1.3. right-hand column, line 18*.

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