| 摘要 |
A media access controller (MAC) is configured with a DOCSIS Header creator circuit. The DOCSIS header creator circuit is configured with logic for receiving a data packet and determining whether the received data packet has an existing packet header prepended thereto. The DOCSIS header creator circuit is further configured to determine if the length of the received data packet includes a cyclic redundancy code. Still further, the DOCSIS header creator circuit is configured to determine a packet header length field value for the received data packet. If the DOCSIS header creator circuit determines that a cyclic redundancy code needs to be included in with the received data packet, then the DOCSIS header creator circuit is able to generate a CRC flag. If the data packet needs to be encrypted, then the DOCSIS header creator circuit will generate an encryption flag if it is determined that the received data packet should be encrypted. Finally, the DOCSIS header creator circuit generates a DOCSIS packet header having a plurality of fields.
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