| 摘要 |
A method and system is disclosed for enabling full-service communications between a full-service cable modem termination system (fsCMTS) and a plurali ty of full-service cable modems (fsCM's) for a conventional two-way hybrid fibe r- coax (HFC) cable television network. Full-service communications include dat a, voice and video. Video includes broadcast quality MPEG-2 transport streams a nd Internet protocol media streams. A multi-channel full-service media-access- control (fsMAC) coordinates the access to the shared upstream and downstream channels. At lease two downstream channels and at least two upstream channel s are provided. Several MAC management messages are defined to enable multi- channel full-service MAC domain to be defined and to enable packet-by-packet true seamless channel change. Using the novel techniques described in this invention, multiple upstream channels can be used in various ways to best optimize the use of the spectrum for accommodating various quality-of-servic e needs of different type of services.
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