Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2006-04-25
2006-04-25
Pham, Chi (Department: 2667)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S432000, C370S493000, C375S222000
Reexamination Certificate
active
07035251
ABSTRACT:
A plurality of CMTS devices are linked together and synchronized to facilitate communication between the respective CMTS devices and respective downstream cable modems. According to one embodiment of the invention, one of the CMTS devices is designated as a master device, and the other CMTS devices are designated as slave devices. The respective CMTS devices are connected to each other by means of a synchronization bus. The master CMTS device then generates and broadcasts a future time stamp value, which is received by the respective slave CMTS devices. When the time stamp counter in the master CMTS device reaches the transmitted value, a control signal is broadcast over the synchronization bus. The slave CMTS devices then retrieve the time stamp value and reset their respective local time stamp counters to the received value. In this manner, the CMTS devices are synchronized.
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Copy of International Search Report for International Appl. No. PCT/US00/23928, filed Aug. 31, 2000.
U.S. Appl. No. 09/652,718, filed Aug. 31, 2000, Denney et al.
Denney Lisa V.
Dworkin David R.
Hebsgaard Anders
Lee Robert J.
Quigley Thomas J.
Boakye Alexander O.
Broadcom Corporation
Pham Chi
Sterne Kessler Goldstein & Fox P.L.L.C.
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