| US 7,577,129 B2 | ||
| Supporting multiple logical channels in a physical interface | ||
| Niki R Pantelias, Duluth, Ga. (US); and Yushan Lu, Mission Viejo, Calif. (US) | ||
| Assigned to Broadcom Corporation, Irvine, Calif. (US) | ||
| Filed on Oct. 17, 2002, as Appl. No. 10/272,371. | ||
| Prior Publication US 2004/0076181 A1, Apr. 22, 2004 | ||
| Int. Cl. H04L 12/56 (2006.01) | ||
| U.S. Cl. 370—347 [370/421; 370/442; 725/95; 725/111; 725/144] | 8 Claims |
| 1. A method for supplying MAP messages to a single upstream demodulator, said single upstream demodulator operable to anticipate
upstream burst arrivals, comprising the steps of:
sending one or more MAP messages via a downstream by a media access controller (MAC) included within a cable modem termination
system (CMTS);
extracting said one or more MAP messages from said downstream by said MAC;
translating said one or more MAP messages by said MAC into individual elements, wherein each individual element corresponds
to an incoming burst, wherein each of said individual elements comprises a SID;
adding said individual elements to a time-ordered queue in said MAC;
sending said individual elements from said time-ordered queue to said single upstream demodulator, wherein said individual
elements are sent in chronological order according to placement in said time-ordered queue; and
determining upstream operating characteristics by said single upstream demodulator corresponding to each of said individual
elements, wherein at least two of said individual elements correspond to different logical upstream channels, each logical
upstream channel having different operating characteristics and being received at said single upstream demodulator.
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