Download Comtech EF Data Vipersat CDM-570 User guide

APPENDIX
ECM MIGRATION
Migrating from STDMA/ECMv1 to Aloha/ECMv2
General
The material in this appendix is offered to provide a step-by-step procedure for
network operators to migrate an STDMA/ECMv1 control channel to the latest
version of Aloha/ECMv2. This new Entry Channel feature is based on modified
slotted Aloha and differs from the current STDMA/ECM control protocol, but it
does leverage some of the STDMA software foundation to support the feature
changes.
The two ECM versions share common code from the point of STDMA feature
enable, multicast IP address, group ID, preamble, and guardband settings.
However, ECMv2 differs by providing the following:
Hub Control
• Hub Controller demodulator receive parameter set is propagated to all
listening Remotes for auto-configuration of transmit parameter sets
• No list of Remotes required for control; offers unsolicited access
• Simple control channel carrier mobility
Remote Control
• Transmit carrier parameters controlled by Hub Channel Controller
• No customer data traffic sent while in Entry Channel mode; only M&C
Appendix D - ECM Migration
D-1