DOCSIS MAC管理消息类型

MAC帧为CMC与CM之间MAC子层的传输单位。

在上行方向，MAC帧前面为PMD子层开销。

在下行方向，MAC帧前面为MPEG传输汇聚头。

MAC帧：MAC Header+Data PDU

MAC帧的开始部分为MAC头：FC(1)，MAC_PARM(1), LEN(2), EHDR(0-240), HCS(2)

C-DOCSIS必须支持的MAC管理消息：

SYNC: Time Synchronization

UCD: Upstream Channel Descriptor

MAP: Upstream Bandwidth Allocation

MDD: MAC Domain Descriptor

CM-STATUS: CM Status Report

RNG-REQ: Ranging REQ

RNG-RSP: Ranging RSP

REG-REQ: Registration REQ

REG-RSP: Registration RSP

REG-ACK: Registration ACK

DSA-REQ: Dynamic Service Addition REQ

DSA-RSP: Dynamic Service Addition RSP

DSA-ACK: Dynamic Service Addition ACK

DSC-REQ: Dynamic Service Chang REQ

DSC-RSP: Dynamic Service Chang RSP

DSC-ACK: Dynamic Service Chang ACK

DSD-REQ: Dynamic Service Deletion REQ

DSD-RSP: Dynamic Service Deletion RSP

DSD-ACK: Dynamic Service Deletion ACK

DCC-REQ: Dynamic Channel Change REQ

DCC-RSP: Dynamic Channel Change RSP

DCC-ACK: Dynamic Channel Change ACK

DBC-REQ: Dynamic Bonding Change REQ

DBC-RSP: Dynamic Bonding Change RSP

DBC-ACK: Dynamic Bonding Change ACK

BPKM-REQ: Baseline Privacy Key Management REQ

BPKM-RSP: Baseline Privacy Kay Management RSP