METHOD AND APPARATUS FACILITATING DOWNSTREAM FREQUENCY OVERRIDE IN A DATA-OVER-CABLE SYSTEM

摘要

A method and apparatus for facilitating downstream frequency override in a data-over-cable system is described. In one example, a data-over-cable system having a plurality of cable modem termination system (CMTS) elements is described. Each of the CMTS elements includes demodulation logic configured to detect one of a plurality of native preambles in upstream transmissions. Each of the native preambles may include a first section having a unique pattern and a second section having an equalizer training sequence. A concatenated preamble is formed from each of the native preambles. The concatenated preamble may include a first section having the unique pattern of each of the native preambles in a sequence and a second section having an equalizer training sequence. A burst profile is formed having the concatenated preamble for each of the CMTS elements. The burst profile is transmitted from each of the CMTS elements to a plurality of cable modems.