| 摘要 |
A cable modem locks one of downstream channels and receives a plurality of frequency plan descriptors from a cable modem terminal system (CMTS) over the locked downstream channel. Each frequency plan descriptor includes a fragment quantity field, a fragment sequence number field, and a frequency information field. The cable modem determines if the plurality of frequency plan descriptors transmitted by the CMTS are all received according to the fragment quantity field and the fragment sequence number field of one currently received frequency plan descriptor. The cable modem obtains frequency plan of the cable modem configured by the CMTS according to the frequency information fields if the plurality of frequency plan descriptors are all received, and then locks other downstream channels according to the obtained frequency plan. |
