[Docsis][MDD] MAC Domain Descriptor (MDD)

[Docsis][MDD] MAC Domain Descriptor (MDD)



MAC Domain Descriptor (MDD)



MDD messages are periodically transmitted on all Downstream Channel(s) of DOCSIS 3.0 CMTSs.



The MDD message contains

1.Downstream Channel ID of the Primary Downstream Channel.



The cable modem will read the MDD and know immediately where to tune

1. lock on to the Primary Downstream Channel.



The MDD can

load balancing cable modems in a DOCSIS 3.0 network.  



The MDD also contains additional information for the cable modem

1. available downstream channels

2. available upstream channels

3. upstream frequency range and more.



Reference :

• 
  Top 10 DOCSIS 3.0 Terms You Need to Know


• 
  Data Over Cable Service Interface Specifications DOCSIS® 3.0 Physical Layer Specification (PDF)