Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2005-04-05
2005-04-05
Nguyen, Steven (Department: 2665)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C370S463000, C370S493000
Reexamination Certificate
active
06876678
ABSTRACT:
A Serial Communications Controller (SCC) is configured to provide TDM multiplexing of signals regardless of whether such signals are synchronous or asynchronous signals. When an asynchronous signal is detected, the data rate of the asynchronous signal is automatically measured. The two data streams are buffered, e.g., by FIFOs. Data is clocked-out from the FIFOs into periods of a TDM signal which has a period at least twice that of the faster of the two input signals. In one embodiment alternate periods of the TDM signal are used for the first and second input signals. Bits from the slower of the two input signals are repeated a sufficient number of times, in the TDM signal, that ratio of the rate at which new data bits from the second signal are placed into the TDM signal, to the rate of output of bits from the first stream onto the TDM signal equals (on average) the ratio of the data rates of the first and second input streams. When the ratio of the data rates of the input streams is non-integral, the number of times the bits from the second or slower data stream are repeated, is dithered to keep accumulated skew of data rates in the TDM signal less than a predetermined threshold, such as the duration of a TDM period.
REFERENCES:
patent: 3988545 (1976-10-01), Kuemmerle et al.
patent: 3989892 (1976-11-01), Yoshida et al.
patent: 4035580 (1977-07-01), Dieter et al.
patent: 4353128 (1982-10-01), Cummiskey
patent: 4761781 (1988-08-01), Calvignac et al.
patent: 4881223 (1989-11-01), Debuysscher
patent: 4884264 (1989-11-01), Servel et al.
patent: 4905225 (1990-02-01), Francois et al.
patent: 5027351 (1991-06-01), De Prycker et al.
patent: 5109378 (1992-04-01), Proctor et al.
patent: 5173901 (1992-12-01), DeSomer
patent: 5199028 (1993-03-01), Arnold
patent: 5212686 (1993-05-01), Joy et al.
patent: 5237565 (1993-08-01), Henrion et al.
patent: 5327428 (1994-07-01), Van As et al.
patent: 5970069 (1999-10-01), Kumar et al.
patent: 6157657 (2000-12-01), Humphrey et al.
patent: 6421393 (2002-07-01), Thornton
Motorola; NetComm Press Releases;Motorola System Solution Slashes Development Time for Small-office Routers;pp. 1-2; http://www.mot.com/SPS/RISC
etcomm/docs/pr/hipster_pr.html.
Motorola;Wired;SOHO Reference Designs; pp. 1-3; http://mot-sps.com/solutions/wired/soho/soho-apps.html#hipster.
Motorola; NetComm Press Releases;Motorola Expands Communications Controller Family with First Power PC Architecture;pp. 1-7; http//www.mot.com/SPS/RISC
etcomm/docs/pr/090495_mpo860.html.
Motorola; NetComm Press Releases;Multichannel Controller Added to QUICC Family;pp. 1-2; http//www.mot.com/SPS/RISC
etcomm/docs/pr/022795_MH360.html.
Chow Steven
Huang Wen
Ye Jicheng
Cisco Technology Inc.
Hickman Palermo & Truong & Becker LLP
Nguyen Steven
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