Communication mode identification technique

Details Communication mode identification technique Communication mode identification technique

1993-08-30

1995-08-22

Chin, Wellington

Multiplex communications

Wide area network

Packet switching

375261, H04L 2734, H04J 312

Patent

active

054447127

ABSTRACT:
A technique for use in communications systems utilizing busy and idle modes. In the busy mode, symbols representative of data are transmitted to system end users. In the idle mode, during which no data is communicated to end users, idle mode symbols are transmitted. Such idle mode symbols are not used to represent data and are only transmitted during the idle mode. Advantageously, such idle mode symbols maintain adaptive apparatus, such as AGC circuits, NEXT cancellers and equalizers, in their properly converged state. In the disclosed embodiment, the idle mode symbols are the innermost symbols in a signal constellation and transition from the idle to busy mode is represented by the transmission of a predetermined number of outermost symbols in the signal constellation. Use of such symbols for idle-to-busy mode transitions advantageously provides ready detection of such transitions. In addition, use of the innermost symbols for the idle mode reduces spectral emission and crosstalk.

REFERENCES:
patent: 3955141 (1976-05-01), Lyon et al.
patent: 4891806 (1990-01-01), Farias et al.
patent: 5022053 (1991-06-01), Chung et al.
patent: 5036526 (1991-07-01), McNichol et al.
patent: 5105443 (1992-04-01), Betts et al.
patent: 5233629 (1993-08-01), Paik et al.
U.S. Application Ser. No. 07/620868, filed on Nov. 30, 1990 (J. Werner 17).
U.S. Application Serial No. 07/891500, filed on May 29, 1992. (Huang 2-19).
U.S. Application Serial No. 07/830,036, filed on Jan. 31, 1992 (M. Sobasra 1-18).

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